131221211302 has 16 divisors (see below), whose sum is σ = 201030851520. Its totient is φ = 64211082048.

The previous prime is 131221211281. The next prime is 131221211371. The reversal of 131221211302 is 203112122131.

It is a self number, because there is not a number n which added to its sum of digits gives 131221211302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686474 + ... + 2734882.

It is an arithmetic number, because the mean of its divisors is an integer number (12564428220).

Almost surely, 2^131221211302 is an apocalyptic number.

131221211302 is a deficient number, since it is larger than the sum of its proper divisors (69809640218).

131221211302 is a wasteful number, since it uses less digits than its factorization.

131221211302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77295.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131221211302 its reverse (203112122131), we get a palindrome (334333333433).

The spelling of 131221211302 in words is "one hundred thirty-one billion, two hundred twenty-one million, two hundred eleven thousand, three hundred two".