213131020102 has 32 divisors (see below), whose sum is σ = 429242897664. Its totient is φ = 76650516000.

The previous prime is 213131020009. The next prime is 213131020121. The reversal of 213131020102 is 201020131312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53227524 + ... + 53231527.

It is an arithmetic number, because the mean of its divisors is an integer number (13413840552).

Almost surely, 2^213131020102 is an apocalyptic number.

213131020102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213131020102 is an abundant number, since it is smaller than the sum of its proper divisors (216111877562).

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

213131020102 is a wasteful number, since it uses less digits than its factorization.

213131020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106459084.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213131020102 its reverse (201020131312), we get a palindrome (414151151414).

The spelling of 213131020102 in words is "two hundred thirteen billion, one hundred thirty-one million, twenty thousand, one hundred two".