231233133121 has 2 divisors, whose sum is σ = 231233133122. Its totient is φ = 231233133120.

The previous prime is 231233133113. The next prime is 231233133167. The reversal of 231233133121 is 121331332132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218987497521 + 12245635600 = 467961^2 + 110660^2 .

It is a cyclic number.

It is not a de Polignac number, because 231233133121 - 2³ = 231233133113 is a prime.

It is not a weakly prime, because it can be changed into another prime (231233133721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115616566560 + 115616566561.

It is an arithmetic number, because the mean of its divisors is an integer number (115616566561).

Almost surely, 2^231233133121 is an apocalyptic number.

It is an amenable number.

231233133121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231233133121 is an equidigital number, since it uses as much as digits as its factorization.

231233133121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

Adding to 231233133121 its reverse (121331332132), we get a palindrome (352564465253).

The spelling of 231233133121 in words is "two hundred thirty-one billion, two hundred thirty-three million, one hundred thirty-three thousand, one hundred twenty-one".