121235523081 has 4 divisors (see below), whose sum is σ = 161647364112. Its totient is φ = 80823682052.

The previous prime is 121235523049. The next prime is 121235523107. The reversal of 121235523081 is 180325532121.

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 121235523081 - 2⁵ = 121235523049 is a prime.

It is a super-2 number, since 2×121235523081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121235523181) 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, 20205920511 + ... + 20205920516.

It is an arithmetic number, because the mean of its divisors is an integer number (40411841028).

Almost surely, 2^121235523081 is an apocalyptic number.

It is an amenable number.

121235523081 is a deficient number, since it is larger than the sum of its proper divisors (40411841031).

121235523081 is an equidigital number, since it uses as much as digits as its factorization.

121235523081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40411841030.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 121235523081 in words is "one hundred twenty-one billion, two hundred thirty-five million, five hundred twenty-three thousand, eighty-one".