157100121 has 8 divisors (see below), whose sum is σ = 232740960. Its totient is φ = 104733396.

The previous prime is 157100107. The next prime is 157100123. The reversal of 157100121 is 121001751.

It is a happy number.

It is not a de Polignac number, because 157100121 - 2⁹ = 157099609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157100094 and 157100103.

It is not an unprimeable number, because it can be changed into a prime (157100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2909235 + ... + 2909288.

It is an arithmetic number, because the mean of its divisors is an integer number (29092620).

Almost surely, 2^157100121 is an apocalyptic number.

It is an amenable number.

157100121 is a deficient number, since it is larger than the sum of its proper divisors (75640839).

157100121 is an equidigital number, since it uses as much as digits as its factorization.

157100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818532 (or 5818526 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 157100121 is about 12533.9587122345. The cubic root of 157100121 is about 539.5837223904.

Adding to 157100121 its reverse (121001751), we get a palindrome (278101872).

The spelling of 157100121 in words is "one hundred fifty-seven million, one hundred thousand, one hundred twenty-one".