231201112021 has 32 divisors (see below), whose sum is σ = 275973008256. Its totient is φ = 191304960000.

The previous prime is 231201111989. The next prime is 231201112027. The reversal of 231201112021 is 120211102132.

It is not a de Polignac number, because 231201112021 - 2⁵ = 231201111989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231201111986 and 231201112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201112027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669801 + ... + 954481.

It is an arithmetic number, because the mean of its divisors is an integer number (8624156508).

Almost surely, 2^231201112021 is an apocalyptic number.

It is an amenable number.

231201112021 is a deficient number, since it is larger than the sum of its proper divisors (44771896235).

231201112021 is a wasteful number, since it uses less digits than its factorization.

231201112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284853.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 231201112021 its reverse (120211102132), we get a palindrome (351412214153).

It can be divided in two parts, 23120111 and 2021, that added together give a palindrome (23122132).

The spelling of 231201112021 in words is "two hundred thirty-one billion, two hundred one million, one hundred twelve thousand, twenty-one".