131221202102 has 16 divisors (see below), whose sum is σ = 214335903600. Its totient is φ = 60014052000.

The previous prime is 131221202071. The next prime is 131221202117. The reversal of 131221202102 is 201202122131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59536649 + ... + 59538852.

It is an arithmetic number, because the mean of its divisors is an integer number (13395993975).

Almost surely, 2^131221202102 is an apocalyptic number.

131221202102 is a deficient number, since it is larger than the sum of its proper divisors (83114701498).

131221202102 is a wasteful number, since it uses less digits than its factorization.

131221202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119075551.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 131221202102 its reverse (201202122131), we get a palindrome (332423324233).

The spelling of 131221202102 in words is "one hundred thirty-one billion, two hundred twenty-one million, two hundred two thousand, one hundred two".