121057730231 has 4 divisors (see below), whose sum is σ = 121139142432. Its totient is φ = 120976318032.

The previous prime is 121057730221. The next prime is 121057730257. The reversal of 121057730231 is 132037750121.

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

It is a cyclic number.

It is not a de Polignac number, because 121057730231 - 2¹⁰ = 121057729207 is a prime.

It is a super-2 number, since 2×121057730231² (a number of 23 digits) 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 (121057730221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40703870 + ... + 40706843.

It is an arithmetic number, because the mean of its divisors is an integer number (30284785608).

Almost surely, 2^121057730231 is an apocalyptic number.

121057730231 is a deficient number, since it is larger than the sum of its proper divisors (81412201).

121057730231 is an equidigital number, since it uses as much as digits as its factorization.

121057730231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81412200.

The product of its (nonzero) digits is 8820, while the sum is 32.

The spelling of 121057730231 in words is "one hundred twenty-one billion, fifty-seven million, seven hundred thirty thousand, two hundred thirty-one".