131311102312121 has 4 divisors (see below), whose sum is σ = 131546849354532. Its totient is φ = 131075355269712.

The previous prime is 131311102312087. The next prime is 131311102312127. The reversal of 131311102312121 is 121213201113131.

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 36249791808400 + 95061310503721 = 6020780^2 + 9749939^2 .

It is a cyclic number.

It is not a de Polignac number, because 131311102312121 - 2¹⁰ = 131311102311097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131311102312127) 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, 117873520370 + ... + 117873521483.

It is an arithmetic number, because the mean of its divisors is an integer number (32886712338633).

Almost surely, 2^{131311102312121} is an apocalyptic number.

It is an amenable number.

131311102312121 is a deficient number, since it is larger than the sum of its proper divisors (235747042411).

131311102312121 is an equidigital number, since it uses as much as digits as its factorization.

131311102312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235747042410.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 131311102312121 its reverse (121213201113131), we get a palindrome (252524303425252).

The spelling of 131311102312121 in words is "one hundred thirty-one trillion, three hundred eleven billion, one hundred two million, three hundred twelve thousand, one hundred twenty-one".