131220331102 has 16 divisors (see below), whose sum is σ = 238181441760. Its totient is φ = 52929209088.

The previous prime is 131220331093. The next prime is 131220331103. The reversal of 131220331102 is 201133022131.

It is a self number, because there is not a number n which added to its sum of digits gives 131220331102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220331103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275672727 + ... + 275673202.

It is an arithmetic number, because the mean of its divisors is an integer number (14886340110).

Almost surely, 2^131220331102 is an apocalyptic number.

131220331102 is a deficient number, since it is larger than the sum of its proper divisors (106961110658).

131220331102 is a wasteful number, since it uses less digits than its factorization.

131220331102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551345955.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131220331102 its reverse (201133022131), we get a palindrome (332353353233).

The spelling of 131220331102 in words is "one hundred thirty-one billion, two hundred twenty million, three hundred thirty-one thousand, one hundred two".