121323131321 has 16 divisors (see below), whose sum is σ = 139079270400. Its totient is φ = 103673485008.

The previous prime is 121323131317. The next prime is 121323131381. The reversal of 121323131321 is 123131323121.

It is a cyclic number.

It is not a de Polignac number, because 121323131321 - 2² = 121323131317 is a prime.

It is a super-2 number, since 2×121323131321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121323131381) 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, 3547220 + ... + 3581258.

It is an arithmetic number, because the mean of its divisors is an integer number (8692454400).

Almost surely, 2^121323131321 is an apocalyptic number.

It is an amenable number.

121323131321 is a deficient number, since it is larger than the sum of its proper divisors (17756139079).

121323131321 is a wasteful number, since it uses less digits than its factorization.

121323131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35588.

The product of its digits is 648, while the sum is 23.

Adding to 121323131321 its reverse (123131323121), we get a palindrome (244454454442).

The spelling of 121323131321 in words is "one hundred twenty-one billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-one".