20131321023202 has 16 divisors (see below), whose sum is σ = 31973448737592. Its totient is φ = 9473511228160.

The previous prime is 20131321023181. The next prime is 20131321023263. The reversal of 20131321023202 is 20232012313102.

It can be written as a sum of positive squares in 4 ways, for example, as 19006556841801 + 1124764181401 = 4359651^2 + 1060549^2 .

It is a super-2 number, since 2×20131321023202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129052 + ... + 8159032.

Almost surely, 2^{20131321023202} is an apocalyptic number.

20131321023202 is a deficient number, since it is larger than the sum of its proper divisors (11842127714390).

20131321023202 is a wasteful number, since it uses less digits than its factorization.

20131321023202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225413.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20131321023202 its reverse (20232012313102), we get a palindrome (40363333336304).

The spelling of 20131321023202 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-one million, twenty-three thousand, two hundred two".