123221012331 has 16 divisors (see below), whose sum is σ = 174102575904. Its totient is φ = 77251367424.

The previous prime is 123221012311. The next prime is 123221012363. The reversal of 123221012331 is 133210122321.

It is not a de Polignac number, because 123221012331 - 2²¹ = 123218915179 is a prime.

It is a super-2 number, since 2×123221012331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123221012298 and 123221012307.

It is not an unprimeable number, because it can be changed into a prime (123221012311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934056 + ... + 1057781.

It is an arithmetic number, because the mean of its divisors is an integer number (10881410994).

Almost surely, 2^123221012331 is an apocalyptic number.

123221012331 is a deficient number, since it is larger than the sum of its proper divisors (50881563573).

123221012331 is a wasteful number, since it uses less digits than its factorization.

123221012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993070.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123221012331 its reverse (133210122321), we get a palindrome (256431134652).

The spelling of 123221012331 in words is "one hundred twenty-three billion, two hundred twenty-one million, twelve thousand, three hundred thirty-one".