20131231024131 has 16 divisors (see below), whose sum is σ = 28420687987200. Its totient is φ = 12631304402048.

The previous prime is 20131231024117. The next prime is 20131231024153. The reversal of 20131231024131 is 13142013213102.

It is a cyclic number.

It is not a de Polignac number, because 20131231024131 - 2¹³ = 20131231015939 is a prime.

It is a super-4 number, since 4×20131231024131⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20131231024111) 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, 12735730 + ... + 14228888.

It is an arithmetic number, because the mean of its divisors is an integer number (1776292999200).

Almost surely, 2^{20131231024131} is an apocalyptic number.

20131231024131 is a deficient number, since it is larger than the sum of its proper divisors (8289456963069).

20131231024131 is a wasteful number, since it uses less digits than its factorization.

20131231024131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757538.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20131231024131 its reverse (13142013213102), we get a palindrome (33273244237233).

The spelling of 20131231024131 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty-one million, twenty-four thousand, one hundred thirty-one".