121271859931 has 2 divisors, whose sum is σ = 121271859932. Its totient is φ = 121271859930.

The previous prime is 121271859913. The next prime is 121271859977. The reversal of 121271859931 is 139958172121.

Together with previous prime (121271859913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (139958172121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121271859931 - 2⁵ = 121271859899 is a prime.

It is a super-2 number, since 2×121271859931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121271859431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60635929965 + 60635929966.

It is an arithmetic number, because the mean of its divisors is an integer number (60635929966).

Almost surely, 2^121271859931 is an apocalyptic number.

121271859931 is a deficient number, since it is larger than the sum of its proper divisors (1).

121271859931 is an equidigital number, since it uses as much as digits as its factorization.

121271859931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 49.

The spelling of 121271859931 in words is "one hundred twenty-one billion, two hundred seventy-one million, eight hundred fifty-nine thousand, nine hundred thirty-one".