131220102 has 32 divisors (see below), whose sum is σ = 283258080. Its totient is φ = 40285440.

The previous prime is 131220101. The next prime is 131220143. The reversal of 131220102 is 201022131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39024 + ... + 42252.

It is an arithmetic number, because the mean of its divisors is an integer number (8851815).

Almost surely, 2^131220102 is an apocalyptic number.

131220102 is an abundant number, since it is smaller than the sum of its proper divisors (152037978).

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

131220102 is a wasteful number, since it uses less digits than its factorization.

131220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131220102 is about 11455.1343073750. The cubic root of 131220102 is about 508.1595872633.

Adding to 131220102 its reverse (201022131), we get a palindrome (332242233).

The spelling of 131220102 in words is "one hundred thirty-one million, two hundred twenty thousand, one hundred two".