122856307157 has 4 divisors (see below), whose sum is σ = 122875761996. Its totient is φ = 122836852320.

The previous prime is 122856307153. The next prime is 122856307159. The reversal of 122856307157 is 751703658221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99019726276 + 23836580881 = 314674^2 + 154391^2 .

It is a cyclic number.

It is not a de Polignac number, because 122856307157 - 2² = 122856307153 is a prime.

It is a super-3 number, since 3×122856307157³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122856307153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9717944 + ... + 9730577.

It is an arithmetic number, because the mean of its divisors is an integer number (30718940499).

Almost surely, 2^122856307157 is an apocalyptic number.

It is an amenable number.

122856307157 is a deficient number, since it is larger than the sum of its proper divisors (19454839).

122856307157 is an equidigital number, since it uses as much as digits as its factorization.

122856307157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19454838.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 122856307157 in words is "one hundred twenty-two billion, eight hundred fifty-six million, three hundred seven thousand, one hundred fifty-seven".