2331331120021 has 2 divisors, whose sum is σ = 2331331120022. Its totient is φ = 2331331120020.

The previous prime is 2331331119977. The next prime is 2331331120039. The reversal of 2331331120021 is 1200211331332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1821727881796 + 509603238225 = 1349714^2 + 713865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2331331120021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2331331119974 and 2331331120001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331331123021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165665560010 + 1165665560011.

It is an arithmetic number, because the mean of its divisors is an integer number (1165665560011).

Almost surely, 2^{2331331120021} is an apocalyptic number.

It is an amenable number.

2331331120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331331120021 is an equidigital number, since it uses as much as digits as its factorization.

2331331120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2331331120021 its reverse (1200211331332), we get a palindrome (3531542451353).

It can be divided in two parts, 23313311 and 20021, that added together give a palindrome (23333332).

The spelling of 2331331120021 in words is "two trillion, three hundred thirty-one billion, three hundred thirty-one million, one hundred twenty thousand, twenty-one".