121321113231 has 16 divisors (see below), whose sum is σ = 171402909440. Its totient is φ = 76116412800.

The previous prime is 121321113187. The next prime is 121321113257. The reversal of 121321113231 is 132311123121.

It is not a de Polignac number, because 121321113231 - 2²⁶ = 121254004367 is a prime.

It is a super-2 number, since 2×121321113231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121321113198 and 121321113207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321113281) 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, 7039210 + ... + 7056423.

It is an arithmetic number, because the mean of its divisors is an integer number (10712681840).

Almost surely, 2^121321113231 is an apocalyptic number.

121321113231 is a deficient number, since it is larger than the sum of its proper divisors (50081796209).

121321113231 is a wasteful number, since it uses less digits than its factorization.

121321113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14095806.

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

Adding to 121321113231 its reverse (132311123121), we get a palindrome (253632236352).

The spelling of 121321113231 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-one".