121090157 has 4 divisors (see below), whose sum is σ = 121664256. Its totient is φ = 120516060.

The previous prime is 121090153. The next prime is 121090163. The reversal of 121090157 is 751090121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121090157 - 2² = 121090153 is a prime.

It is a super-2 number, since 2×121090157² = 29325652244569298, which contains 22 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 (121090153) 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, 286733 + ... + 287154.

It is an arithmetic number, because the mean of its divisors is an integer number (30416064).

Almost surely, 2^121090157 is an apocalyptic number.

It is an amenable number.

121090157 is a deficient number, since it is larger than the sum of its proper divisors (574099).

121090157 is an equidigital number, since it uses as much as digits as its factorization.

121090157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574098.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 121090157 is about 11004.0972823762. The cubic root of 121090157 is about 494.7315580160.

The spelling of 121090157 in words is "one hundred twenty-one million, ninety thousand, one hundred fifty-seven".