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21202012202201 = 23832769174007
BaseRepresentation
bin1001101001000011110100…
…11001111110010011011001
32210001220002200111002010122
410310201322121332103121
510234333210110432301
6113032023035123025
74315536425120435
oct464417231762331
983056080432118
1021202012202201
1168347a5175456
122465112ba3475
13baa458728b1c
1453427bad99c5
1526b7a654481b
hex13487a67e4d9

21202012202201 has 24 divisors (see below), whose sum is σ = 22422851848320. Its totient is φ = 20009676589056.

The previous prime is 21202012202183. The next prime is 21202012202213. The reversal of 21202012202201 is 10220221020212.

It is a happy number.

It is not a de Polignac number, because 21202012202201 - 226 = 21201945093337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202012202201.

It is not an unprimeable number, because it can be changed into a prime (21202012205201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121758740 + ... + 121932746.

It is an arithmetic number, because the mean of its divisors is an integer number (934285493680).

Almost surely, 221202012202201 is an apocalyptic number.

It is an amenable number.

21202012202201 is a deficient number, since it is larger than the sum of its proper divisors (1220839646119).

21202012202201 is an equidigital number, since it uses as much as digits as its factorization.

21202012202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174965 (or 174882 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202012202201 its reverse (10220221020212), we get a palindrome (31422233222413).

The spelling of 21202012202201 in words is "twenty-one trillion, two hundred two billion, twelve million, two hundred two thousand, two hundred one".

Divisors: 1 23 83 769 1909 6889 17687 63827 158447 174007 1468021 4002161 5297641 14442581 121845743 133811383 332179363 1198734223 3077661809 11106344789 27570887129 255445930147 921826617487 21202012202201