121312331971 has 2 divisors, whose sum is σ = 121312331972. Its totient is φ = 121312331970.

The previous prime is 121312331953. The next prime is 121312332013. The reversal of 121312331971 is 179133213121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121312331971 - 2³¹ = 119164848323 is a prime.

It is not a weakly prime, because it can be changed into another prime (121312331951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656165985 + 60656165986.

It is an arithmetic number, because the mean of its divisors is an integer number (60656165986).

Almost surely, 2^121312331971 is an apocalyptic number.

121312331971 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312331971 is an equidigital number, since it uses as much as digits as its factorization.

121312331971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The spelling of 121312331971 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred thirty-one thousand, nine hundred seventy-one".