121090158 has 24 divisors (see below), whose sum is σ = 299842608. Its totient is φ = 34597152.

The previous prime is 121090153. The next prime is 121090163. The reversal of 121090158 is 851090121.

It is an interprime number because it is at equal distance from previous prime (121090153) and next prime (121090163).

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 11 ways as a sum of consecutive naturals, for example, 480391 + ... + 480642.

It is an arithmetic number, because the mean of its divisors is an integer number (12493442).

Almost surely, 2^121090158 is an apocalyptic number.

121090158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121090158 is an abundant number, since it is smaller than the sum of its proper divisors (178752450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121090158 is a wasteful number, since it uses less digits than its factorization.

121090158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961048 (or 961045 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 121090158 is about 11004.0973278139. The cubic root of 121090158 is about 494.7315593779.

The spelling of 121090158 in words is "one hundred twenty-one million, ninety thousand, one hundred fifty-eight".