20012231031 has 16 divisors (see below), whose sum is σ = 28740313056. Its totient is φ = 12313161216.

The previous prime is 20012231027. The next prime is 20012231053. The reversal of 20012231031 is 13013221002.

It is not a de Polignac number, because 20012231031 - 2² = 20012231027 is a prime.

It is a super-2 number, since 2×20012231031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20012231031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012230031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212811 + ... + 292083.

It is an arithmetic number, because the mean of its divisors is an integer number (1796269566).

Almost surely, 2^20012231031 is an apocalyptic number.

20012231031 is a deficient number, since it is larger than the sum of its proper divisors (8728082025).

20012231031 is a wasteful number, since it uses less digits than its factorization.

20012231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85762.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20012231031 its reverse (13013221002), we get a palindrome (33025452033).

The spelling of 20012231031 in words is "twenty billion, twelve million, two hundred thirty-one thousand, thirty-one".