120997951157 has 2 divisors, whose sum is σ = 120997951158. Its totient is φ = 120997951156.

The previous prime is 120997951153. The next prime is 120997951211. The reversal of 120997951157 is 751159799021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112832840836 + 8165110321 = 335906^2 + 90361^2 .

It is an emirp because it is prime and its reverse (751159799021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120997951157 - 2² = 120997951153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120997951153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60498975578 + 60498975579.

It is an arithmetic number, because the mean of its divisors is an integer number (60498975579).

Almost surely, 2^120997951157 is an apocalyptic number.

It is an amenable number.

120997951157 is a deficient number, since it is larger than the sum of its proper divisors (1).

120997951157 is an equidigital number, since it uses as much as digits as its factorization.

120997951157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1786050, while the sum is 56.

The spelling of 120997951157 in words is "one hundred twenty billion, nine hundred ninety-seven million, nine hundred fifty-one thousand, one hundred fifty-seven".