231689589121 has 4 divisors (see below), whose sum is σ = 231837069744. Its totient is φ = 231542108500.

The previous prime is 231689589107. The next prime is 231689589163. The reversal of 231689589121 is 121985986132.

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 231689589121 - 2²⁷ = 231555371393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231689589181) 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, 73737955 + ... + 73741096.

It is an arithmetic number, because the mean of its divisors is an integer number (57959267436).

Almost surely, 2^231689589121 is an apocalyptic number.

It is an amenable number.

231689589121 is a deficient number, since it is larger than the sum of its proper divisors (147480623).

231689589121 is a wasteful number, since it uses less digits than its factorization.

231689589121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147480622.

The product of its digits is 1866240, while the sum is 55.

The spelling of 231689589121 in words is "two hundred thirty-one billion, six hundred eighty-nine million, five hundred eighty-nine thousand, one hundred twenty-one".