20131131212110 has 64 divisors (see below), whose sum is σ = 38272521672000. Its totient is φ = 7602797002752.

The previous prime is 20131131212077. The next prime is 20131131212123. The reversal of 20131131212110 is 1121213113102.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128098702 + ... + 128255758.

It is an arithmetic number, because the mean of its divisors is an integer number (598008151125).

Almost surely, 2^{20131131212110} is an apocalyptic number.

20131131212110 is a deficient number, since it is larger than the sum of its proper divisors (18141390459890).

20131131212110 is a wasteful number, since it uses less digits than its factorization.

20131131212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159365.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20131131212110 its reverse (1121213113102), we get a palindrome (21252344325212).

It can be divided in two parts, 2013113 and 1212110, that added together give a palindrome (3225223).

The spelling of 20131131212110 in words is "twenty trillion, one hundred thirty-one billion, one hundred thirty-one million, two hundred twelve thousand, one hundred ten".