131221102010113 has 4 divisors (see below), whose sum is σ = 131408293311828. Its totient is φ = 131033910708400.

The previous prime is 131221102010111. The next prime is 131221102010149. The reversal of 131221102010113 is 311010201122131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84065646487824 + 47155455522289 = 9168732^2 + 6866983^2 .

It is a cyclic number.

It is not a de Polignac number, because 131221102010113 - 2¹ = 131221102010111 is a prime.

It is a super-2 number, since 2×131221102010113² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131221102010111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93595649806 + ... + 93595651207.

It is an arithmetic number, because the mean of its divisors is an integer number (32852073327957).

Almost surely, 2^{131221102010113} is an apocalyptic number.

It is an amenable number.

131221102010113 is a deficient number, since it is larger than the sum of its proper divisors (187191301715).

131221102010113 is an equidigital number, since it uses as much as digits as its factorization.

131221102010113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187191301714.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 131221102010113 its reverse (311010201122131), we get a palindrome (442231303132244).

The spelling of 131221102010113 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, one hundred two million, ten thousand, one hundred thirteen".