121010101957 has 2 divisors, whose sum is σ = 121010101958. Its totient is φ = 121010101956.

The previous prime is 121010101903. The next prime is 121010102011. The reversal of 121010101957 is 759101010121.

It is a balanced prime because it is at equal distance from previous prime (121010101903) and next prime (121010102011).

It can be written as a sum of positive squares in only one way, i.e., 118849804516 + 2160297441 = 344746^2 + 46479^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010101957 - 2²⁷ = 120875884229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010101757) 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, 60505050978 + 60505050979.

It is an arithmetic number, because the mean of its divisors is an integer number (60505050979).

Almost surely, 2^121010101957 is an apocalyptic number.

It is an amenable number.

121010101957 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010101957 is an equidigital number, since it uses as much as digits as its factorization.

121010101957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 28.

The spelling of 121010101957 in words is "one hundred twenty-one billion, ten million, one hundred one thousand, nine hundred fifty-seven".