231032121 has 8 divisors (see below), whose sum is σ = 308256480. Its totient is φ = 153914592.

The previous prime is 231032101. The next prime is 231032161. The reversal of 231032121 is 121230132.

231032121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231032121 - 2¹³ = 231023929 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231032121.

It is not an unprimeable number, because it can be changed into a prime (231032101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21516 + ... + 30413.

It is an arithmetic number, because the mean of its divisors is an integer number (38532060).

Almost surely, 2^231032121 is an apocalyptic number.

It is an amenable number.

231032121 is a deficient number, since it is larger than the sum of its proper divisors (77224359).

231032121 is a wasteful number, since it uses less digits than its factorization.

231032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53415.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231032121 is about 15199.7408201587. The cubic root of 231032121 is about 613.6076824445.

Adding to 231032121 its reverse (121230132), we get a palindrome (352262253).

The spelling of 231032121 in words is "two hundred thirty-one million, thirty-two thousand, one hundred twenty-one".