2331323021021 has 2 divisors, whose sum is σ = 2331323021022. Its totient is φ = 2331323021020.

The previous prime is 2331323020979. The next prime is 2331323021081. The reversal of 2331323021021 is 1201203231332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288483792996 + 1042839228025 = 1135114^2 + 1021195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2331323021021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331323021081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165661510510 + 1165661510511.

It is an arithmetic number, because the mean of its divisors is an integer number (1165661510511).

Almost surely, 2^{2331323021021} is an apocalyptic number.

It is an amenable number.

2331323021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331323021021 is an equidigital number, since it uses as much as digits as its factorization.

2331323021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2331323021021 its reverse (1201203231332), we get a palindrome (3532526252353).

The spelling of 2331323021021 in words is "two trillion, three hundred thirty-one billion, three hundred twenty-three million, twenty-one thousand, twenty-one".