31331234314021 has 2 divisors, whose sum is σ = 31331234314022. Its totient is φ = 31331234314020.

The previous prime is 31331234313997. The next prime is 31331234314067. The reversal of 31331234314021 is 12041343213313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30306511368225 + 1024722945796 = 5505135^2 + 1012286^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331234314021 - 2¹¹ = 31331234311973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31331234317021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665617157010 + 15665617157011.

It is an arithmetic number, because the mean of its divisors is an integer number (15665617157011).

Almost surely, 2^{31331234314021} is an apocalyptic number.

It is an amenable number.

31331234314021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331234314021 is an equidigital number, since it uses as much as digits as its factorization.

31331234314021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 31331234314021 its reverse (12041343213313), we get a palindrome (43372577527334).

The spelling of 31331234314021 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred thirty-four million, three hundred fourteen thousand, twenty-one".