20131301321220 has 96 divisors (see below), whose sum is σ = 58528127750400. Its totient is φ = 5163962965504.

The previous prime is 20131301321207. The next prime is 20131301321227. The reversal of 20131301321220 is 2212310313102.

It is not an unprimeable number, because it can be changed into a prime (20131301321227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21036984 + ... + 21973103.

It is an arithmetic number, because the mean of its divisors is an integer number (609667997400).

Almost surely, 2^{20131301321220} is an apocalyptic number.

20131301321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131301321220 is an abundant number, since it is smaller than the sum of its proper divisors (38396826429180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20131301321220 is a wasteful number, since it uses less digits than its factorization.

20131301321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010397 (or 43010395 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20131301321220 its reverse (2212310313102), we get a palindrome (22343611634322).

The spelling of 20131301321220 in words is "twenty trillion, one hundred thirty-one billion, three hundred one million, three hundred twenty-one thousand, two hundred twenty".