233121031313 has 2 divisors, whose sum is σ = 233121031314. Its totient is φ = 233121031312.

The previous prime is 233121031307. The next prime is 233121031327. The reversal of 233121031313 is 313130121332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232162076224 + 958955089 = 481832^2 + 30967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233121031313 is a prime.

It is not a weakly prime, because it can be changed into another prime (233121031343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116560515656 + 116560515657.

It is an arithmetic number, because the mean of its divisors is an integer number (116560515657).

Almost surely, 2^233121031313 is an apocalyptic number.

It is an amenable number.

233121031313 is a deficient number, since it is larger than the sum of its proper divisors (1).

233121031313 is an equidigital number, since it uses as much as digits as its factorization.

233121031313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 233121031313 its reverse (313130121332), we get a palindrome (546251152645).

The spelling of 233121031313 in words is "two hundred thirty-three billion, one hundred twenty-one million, thirty-one thousand, three hundred thirteen".