20131023211231 has 16 divisors (see below), whose sum is σ = 20758477546656. Its totient is φ = 19513857033216.

The previous prime is 20131023211183. The next prime is 20131023211237. The reversal of 20131023211231 is 13211232013102.

It is a cyclic number.

It is not a de Polignac number, because 20131023211231 - 2⁴¹ = 17931999955679 is a prime.

It is a super-2 number, since 2×20131023211231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131023211237) 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, 3494985 + ... + 7244098.

It is an arithmetic number, because the mean of its divisors is an integer number (1297404846666).

Almost surely, 2^{20131023211231} is an apocalyptic number.

20131023211231 is a deficient number, since it is larger than the sum of its proper divisors (627454335425).

20131023211231 is a wasteful number, since it uses less digits than its factorization.

20131023211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10739562.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20131023211231 its reverse (13211232013102), we get a palindrome (33342255224333).

The spelling of 20131023211231 in words is "twenty trillion, one hundred thirty-one billion, twenty-three million, two hundred eleven thousand, two hundred thirty-one".