20131321123111 has 96 divisors (see below), whose sum is σ = 24619205318400. Its totient is φ = 16302907084800.

The previous prime is 20131321123007. The next prime is 20131321123183. The reversal of 20131321123111 is 11132112313102.

It is not a de Polignac number, because 20131321123111 - 2¹⁵ = 20131321090343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131321423111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 835069920 + ... + 835094026.

It is an arithmetic number, because the mean of its divisors is an integer number (256450055400).

Almost surely, 2^{20131321123111} is an apocalyptic number.

20131321123111 is a deficient number, since it is larger than the sum of its proper divisors (4487884195289).

20131321123111 is a wasteful number, since it uses less digits than its factorization.

20131321123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24385 (or 24368 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 20131321123111 its reverse (11132112313102), we get a palindrome (31263433436213).

It can be divided in two parts, 20 and 131321123111, that added together give a palindrome (131321123131).

The spelling of 20131321123111 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred eleven".