131223321313221 has 16 divisors (see below), whose sum is σ = 188867149119360. Its totient is φ = 80793169343040.

The previous prime is 131223321313087. The next prime is 131223321313261. The reversal of 131223321313221 is 122313123322131.

It is a happy number.

It is not a de Polignac number, because 131223321313221 - 2³³ = 131214731378629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223321313261) 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, 32789433610 + ... + 32789437611.

It is an arithmetic number, because the mean of its divisors is an integer number (11804196819960).

Almost surely, 2^{131223321313221} is an apocalyptic number.

It is an amenable number.

131223321313221 is a deficient number, since it is larger than the sum of its proper divisors (57643827806139).

131223321313221 is a wasteful number, since it uses less digits than its factorization.

131223321313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65578871276.

The product of its digits is 7776, while the sum is 30.

Adding to 131223321313221 its reverse (122313123322131), we get a palindrome (253536444635352).

The spelling of 131223321313221 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-one".