213031101231 has 48 divisors (see below), whose sum is σ = 335295586080. Its totient is φ = 129549404160.

The previous prime is 213031101209. The next prime is 213031101299. The reversal of 213031101231 is 132101130312.

213031101231 is a `hidden beast` number, since 21 + 303 + 110 + 1 + 231 = 666.

213031101231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213031101231 - 2⁷ = 213031101103 is a prime.

It is a super-2 number, since 2×213031101231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213031100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22497760 + ... + 22507226.

It is an arithmetic number, because the mean of its divisors is an integer number (6985324710).

Almost surely, 2^213031101231 is an apocalyptic number.

213031101231 is a deficient number, since it is larger than the sum of its proper divisors (122264484849).

213031101231 is a wasteful number, since it uses less digits than its factorization.

213031101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11736 (or 11733 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 213031101231 its reverse (132101130312), we get a palindrome (345132231543).

The spelling of 213031101231 in words is "two hundred thirteen billion, thirty-one million, one hundred one thousand, two hundred thirty-one".