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21022201121 = 146991430179
BaseRepresentation
bin10011100101000001…
…010101010100100001
32000021001222110120112
4103211001111110201
5321023140413441
613354002421105
71342643522045
oct234501252441
960231873515
1021022201121
118a08536939
1240a8361795
131ca03b907c
141035d72025
158308854eb
hex4e5055521

21022201121 has 4 divisors (see below), whose sum is σ = 21023646000. Its totient is φ = 21020756244.

The previous prime is 21022201111. The next prime is 21022201153. The reversal of 21022201121 is 12110222012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21022201121 - 214 = 21022184737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21022201096 and 21022201105.

It is not an unprimeable number, because it can be changed into a prime (21022201111) 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, 700391 + ... + 729788.

It is an arithmetic number, because the mean of its divisors is an integer number (5255911500).

Almost surely, 221022201121 is an apocalyptic number.

It is an amenable number.

21022201121 is a deficient number, since it is larger than the sum of its proper divisors (1444879).

21022201121 is a wasteful number, since it uses less digits than its factorization.

21022201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444878.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21022201121 its reverse (12110222012), we get a palindrome (33132423133).

The spelling of 21022201121 in words is "twenty-one billion, twenty-two million, two hundred one thousand, one hundred twenty-one".

Divisors: 1 14699 1430179 21022201121