233121313213 has 2 divisors, whose sum is σ = 233121313214. Its totient is φ = 233121313212.

The previous prime is 233121313189. The next prime is 233121313261. The reversal of 233121313213 is 312313121332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180146766969 + 52974546244 = 424437^2 + 230162^2 .

It is a cyclic number.

It is not a de Polignac number, because 233121313213 - 2³⁷ = 95682359741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233121313013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116560656606 + 116560656607.

It is an arithmetic number, because the mean of its divisors is an integer number (116560656607).

Almost surely, 2^233121313213 is an apocalyptic number.

It is an amenable number.

233121313213 is a deficient number, since it is larger than the sum of its proper divisors (1).

233121313213 is an equidigital number, since it uses as much as digits as its factorization.

233121313213 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 233121313213 its reverse (312313121332), we get a palindrome (545434434545).

The spelling of 233121313213 in words is "two hundred thirty-three billion, one hundred twenty-one million, three hundred thirteen thousand, two hundred thirteen".