20131312103210 has 256 divisors, whose sum is σ = 48612711333888. Its totient is φ = 5817126585600.

The previous prime is 20131312103209. The next prime is 20131312103219. The reversal of 20131312103210 is 1230121313102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20131312103219) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 85616705 + ... + 85851515.

It is an arithmetic number, because the mean of its divisors is an integer number (189893403648).

Almost surely, 2^{20131312103210} is an apocalyptic number.

20131312103210 is an abundant number, since it is smaller than the sum of its proper divisors (28481399230678).

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

20131312103210 is a wasteful number, since it uses less digits than its factorization.

20131312103210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235009.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20131312103210 its reverse (1230121313102), we get a palindrome (21361433416312).

The spelling of 20131312103210 in words is "twenty trillion, one hundred thirty-one billion, three hundred twelve million, one hundred three thousand, two hundred ten".