2331323021081 has 2 divisors, whose sum is σ = 2331323021082. Its totient is φ = 2331323021080.

The previous prime is 2331323021021. The next prime is 2331323021099. The reversal of 2331323021081 is 1801203231332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2228798183056 + 102524838025 = 1492916^2 + 320195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331323021081 - 2³⁰ = 2330249279257 is a prime.

It is a super-2 number, since 2×2331323021081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2331323021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165661510540 + 1165661510541.

It is an arithmetic number, because the mean of its divisors is an integer number (1165661510541).

Almost surely, 2^{2331323021081} is an apocalyptic number.

It is an amenable number.

2331323021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331323021081 is an equidigital number, since it uses as much as digits as its factorization.

2331323021081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 2331323021081 in words is "two trillion, three hundred thirty-one billion, three hundred twenty-three million, twenty-one thousand, eighty-one".