231121012203 has 32 divisors (see below), whose sum is σ = 378305510400. Its totient is φ = 138712007808.

The previous prime is 231121012201. The next prime is 231121012229. The reversal of 231121012203 is 302210121132.

231121012203 is a `hidden beast` number, since 231 + 1 + 210 + 1 + 220 + 3 = 666.

It is not a de Polignac number, because 231121012203 - 2¹ = 231121012201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231121012201) 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, 10935783 + ... + 10956896.

It is an arithmetic number, because the mean of its divisors is an integer number (11822047200).

Almost surely, 2^231121012203 is an apocalyptic number.

231121012203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231121012203 is a deficient number, since it is larger than the sum of its proper divisors (147184498197).

231121012203 is a wasteful number, since it uses less digits than its factorization.

231121012203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21892728 (or 21892722 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231121012203 its reverse (302210121132), we get a palindrome (533331133335).

The spelling of 231121012203 in words is "two hundred thirty-one billion, one hundred twenty-one million, twelve thousand, two hundred three".