20331332231311 has 2 divisors, whose sum is σ = 20331332231312. Its totient is φ = 20331332231310.

The previous prime is 20331332231237. The next prime is 20331332231351. The reversal of 20331332231311 is 11313223313302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20331332231311 - 2¹⁹ = 20331331707023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331332231311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331332231351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165666115655 + 10165666115656.

It is an arithmetic number, because the mean of its divisors is an integer number (10165666115656).

Almost surely, 2^{20331332231311} is an apocalyptic number.

20331332231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331332231311 is an equidigital number, since it uses as much as digits as its factorization.

20331332231311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 20331332231311 its reverse (11313223313302), we get a palindrome (31644555544613).

The spelling of 20331332231311 in words is "twenty trillion, three hundred thirty-one billion, three hundred thirty-two million, two hundred thirty-one thousand, three hundred eleven".