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21201022121102 = 212715138336927
BaseRepresentation
bin1001101001000001111110…
…11001000111010010001110
32210001210112200110202012022
410310200333121013102032
510234324143130333402
6113031340510210142
74315503043430555
oct464407731072216
983053480422168
1021201022121102
11683433730690a
122464a974b3952
13baa32b582615
145341c6410d9c
1526b7496722a2
hex13483f64748e

21201022121102 has 8 divisors (see below), whose sum is σ = 31801562006976. Its totient is φ = 10600501452112.

The previous prime is 21201022121101. The next prime is 21201022121113. The reversal of 21201022121102 is 20112122010212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201022121101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625438 + ... + 6711489.

It is an arithmetic number, because the mean of its divisors is an integer number (3975195250872).

Almost surely, 221201022121102 is an apocalyptic number.

21201022121102 is a deficient number, since it is larger than the sum of its proper divisors (10600539885874).

21201022121102 is a wasteful number, since it uses less digits than its factorization.

21201022121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9608442.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21201022121102 its reverse (20112122010212), we get a palindrome (41313144131314).

The spelling of 21201022121102 in words is "twenty-one trillion, two hundred one billion, twenty-two million, one hundred twenty-one thousand, one hundred two".

Divisors: 1 2 1271513 2543026 8336927 16673854 10600511060551 21201022121102