201233231031 has 32 divisors (see below), whose sum is σ = 310587750400. Its totient is φ = 113511041280.

The previous prime is 201233230993. The next prime is 201233231063. The reversal of 201233231031 is 130132332102.

It is not a de Polignac number, because 201233231031 - 2¹⁹ = 201232706743 is a prime.

It is a super-2 number, since 2×201233231031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201233230989 and 201233231007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201233231431) 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, 10543365 + ... + 10562433.

It is an arithmetic number, because the mean of its divisors is an integer number (9705867200).

Almost surely, 2^201233231031 is an apocalyptic number.

201233231031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201233231031 is a deficient number, since it is larger than the sum of its proper divisors (109354519369).

201233231031 is a wasteful number, since it uses less digits than its factorization.

201233231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25519.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 201233231031 its reverse (130132332102), we get a palindrome (331365563133).

The spelling of 201233231031 in words is "two hundred one billion, two hundred thirty-three million, two hundred thirty-one thousand, thirty-one".