121157023 has 12 divisors (see below), whose sum is σ = 133343560. Its totient is φ = 109431792.

The previous prime is 121157017. The next prime is 121157033. The reversal of 121157023 is 320751121.

It is a happy number.

It is not a de Polignac number, because 121157023 - 2⁵ = 121156991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121156985 and 121157003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121157033) 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 in 11 ways as a sum of consecutive naturals, for example, 26608 + ... + 30826.

Almost surely, 2^121157023 is an apocalyptic number.

121157023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121157023 is a deficient number, since it is larger than the sum of its proper divisors (12186537).

121157023 is an equidigital number, since it uses as much as digits as its factorization.

121157023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 121157023 is about 11007.1350950190. The cubic root of 121157023 is about 494.8226048690.

The spelling of 121157023 in words is "one hundred twenty-one million, one hundred fifty-seven thousand, twenty-three".