21122042331 has 12 divisors (see below), whose sum is σ = 30495730488. Its totient is φ = 12998179584.

The previous prime is 21122042299. The next prime is 21122042351. The reversal of 21122042331 is 13324022112.

It is not a de Polignac number, because 21122042331 - 2⁵ = 21122042299 is a prime.

It is a super-2 number, since 2×21122042331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122042298 and 21122042307.

It is not an unprimeable number, because it can be changed into a prime (21122042351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20829910 + ... + 20830923.

It is an arithmetic number, because the mean of its divisors is an integer number (2541310874).

Almost surely, 2^21122042331 is an apocalyptic number.

21122042331 is a deficient number, since it is larger than the sum of its proper divisors (9373688157).

21122042331 is a wasteful number, since it uses less digits than its factorization.

21122042331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41660862 (or 41660849 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21122042331 its reverse (13324022112), we get a palindrome (34446064443).

The spelling of 21122042331 in words is "twenty-one billion, one hundred twenty-two million, forty-two thousand, three hundred thirty-one".