131221022313 has 16 divisors (see below), whose sum is σ = 175185259200. Its totient is φ = 87368792064.

The previous prime is 131221022311. The next prime is 131221022333. The reversal of 131221022313 is 313220122131.

It is not a de Polignac number, because 131221022313 - 2¹ = 131221022311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131221022313.

It is not an unprimeable number, because it can be changed into a prime (131221022311) 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, 14701470 + ... + 14710392.

It is an arithmetic number, because the mean of its divisors is an integer number (10949078700).

Almost surely, 2^131221022313 is an apocalyptic number.

It is an amenable number.

131221022313 is a deficient number, since it is larger than the sum of its proper divisors (43964236887).

131221022313 is a wasteful number, since it uses less digits than its factorization.

131221022313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14648.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131221022313 its reverse (313220122131), we get a palindrome (444441144444).

The spelling of 131221022313 in words is "one hundred thirty-one billion, two hundred twenty-one million, twenty-two thousand, three hundred thirteen".