231121110231 has 12 divisors (see below), whose sum is σ = 364190840520. Its totient is φ = 140073400080.

The previous prime is 231121110217. The next prime is 231121110277. The reversal of 231121110231 is 132011121132.

It is not a de Polignac number, because 231121110231 - 2²¹ = 231119013079 is a prime.

It is a super-2 number, since 2×231121110231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121110281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1167278236 + ... + 1167278433.

It is an arithmetic number, because the mean of its divisors is an integer number (30349236710).

Almost surely, 2^231121110231 is an apocalyptic number.

231121110231 is a deficient number, since it is larger than the sum of its proper divisors (133069730289).

231121110231 is a wasteful number, since it uses less digits than its factorization.

231121110231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334556686 (or 2334556683 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 231121110231 its reverse (132011121132), we get a palindrome (363132231363).

The spelling of 231121110231 in words is "two hundred thirty-one billion, one hundred twenty-one million, one hundred ten thousand, two hundred thirty-one".