31020320120121 has 24 divisors (see below), whose sum is σ = 44990431732896. Its totient is φ = 20595693355200.

The previous prime is 31020320120117. The next prime is 31020320120129. The reversal of 31020320120121 is 12102102302013.

31020320120121 is a `hidden beast` number, since 3 + 102 + 0 + 320 + 120 + 121 = 666.

It is not a de Polignac number, because 31020320120121 - 2² = 31020320120117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020320120094 and 31020320120103.

It is not an unprimeable number, because it can be changed into a prime (31020320120129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1205926 + ... + 7968368.

It is an arithmetic number, because the mean of its divisors is an integer number (1874601322204).

Almost surely, 2^{31020320120121} is an apocalyptic number.

It is an amenable number.

31020320120121 is a deficient number, since it is larger than the sum of its proper divisors (13970111612775).

31020320120121 is a wasteful number, since it uses less digits than its factorization.

31020320120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764533 (or 6764530 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31020320120121 its reverse (12102102302013), we get a palindrome (43122422422134).

The spelling of 31020320120121 in words is "thirty-one trillion, twenty billion, three hundred twenty million, one hundred twenty thousand, one hundred twenty-one".