131331333121 has 4 divisors (see below), whose sum is σ = 131459964244. Its totient is φ = 131202702000.

The previous prime is 131331333109. The next prime is 131331333137. The reversal of 131331333121 is 121333133131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121333133131 = 7 ⋅17333304733.

It can be written as a sum of positive squares in 2 ways, for example, as 63920480625 + 67410852496 = 252825^2 + 259636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131331333121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131331333421) 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, 64314030 + ... + 64316071.

It is an arithmetic number, because the mean of its divisors is an integer number (32864991061).

Almost surely, 2^131331333121 is an apocalyptic number.

It is an amenable number.

131331333121 is a deficient number, since it is larger than the sum of its proper divisors (128631123).

131331333121 is a wasteful number, since it uses less digits than its factorization.

131331333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128631122.

The product of its digits is 1458, while the sum is 25.

Adding to 131331333121 its reverse (121333133131), we get a palindrome (252664466252).

The spelling of 131331333121 in words is "one hundred thirty-one billion, three hundred thirty-one million, three hundred thirty-three thousand, one hundred twenty-one".