121121312331 has 16 divisors (see below), whose sum is σ = 163176265728. Its totient is φ = 79907116800.

The previous prime is 121121312329. The next prime is 121121312369. The reversal of 121121312331 is 133213121121.

It is not a de Polignac number, because 121121312331 - 2¹ = 121121312329 is a prime.

It is a super-2 number, since 2×121121312331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121121312298 and 121121312307.

It is not an unprimeable number, because it can be changed into a prime (121121314331) 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, 4897126 + ... + 4921796.

It is an arithmetic number, because the mean of its divisors is an integer number (10198516608).

Almost surely, 2^121121312331 is an apocalyptic number.

121121312331 is a deficient number, since it is larger than the sum of its proper divisors (42054953397).

121121312331 is a wasteful number, since it uses less digits than its factorization.

121121312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41642.

The product of its digits is 216, while the sum is 21.

Adding to 121121312331 its reverse (133213121121), we get a palindrome (254334433452).

The spelling of 121121312331 in words is "one hundred twenty-one billion, one hundred twenty-one million, three hundred twelve thousand, three hundred thirty-one".