120010021931 has 2 divisors, whose sum is σ = 120010021932. Its totient is φ = 120010021930.

The previous prime is 120010021909. The next prime is 120010021933. The reversal of 120010021931 is 139120010021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120010021931 is a prime.

It is a super-2 number, since 2×120010021931² (a number of 23 digits) contains 22 as substring.

Together with 120010021933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120010021933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60005010965 + 60005010966.

It is an arithmetic number, because the mean of its divisors is an integer number (60005010966).

Almost surely, 2^120010021931 is an apocalyptic number.

120010021931 is a deficient number, since it is larger than the sum of its proper divisors (1).

120010021931 is an equidigital number, since it uses as much as digits as its factorization.

120010021931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 120010021931 its reverse (139120010021), we get a palindrome (259130031952).

The spelling of 120010021931 in words is "one hundred twenty billion, ten million, twenty-one thousand, nine hundred thirty-one".