202131312102 has 12 divisors (see below), whose sum is σ = 437951176260. Its totient is φ = 67377104028.

The previous prime is 202131312101. The next prime is 202131312121. The reversal of 202131312102 is 201213131202.

It is a super-2 number, since 2×202131312102² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11229517339 = 202131312102 / (2 + 0 + 2 + 1 + 3 + 1 + 3 + 1 + 2 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131312101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5614758652 + ... + 5614758687.

It is an arithmetic number, because the mean of its divisors is an integer number (36495931355).

Almost surely, 2^202131312102 is an apocalyptic number.

202131312102 is an abundant number, since it is smaller than the sum of its proper divisors (235819864158).

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

202131312102 is a wasteful number, since it uses less digits than its factorization.

202131312102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229517347 (or 11229517344 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 202131312102 its reverse (201213131202), we get a palindrome (403344443304).

The spelling of 202131312102 in words is "two hundred two billion, one hundred thirty-one million, three hundred twelve thousand, one hundred two".