31311001021103 has 2 divisors, whose sum is σ = 31311001021104. Its totient is φ = 31311001021102.

The previous prime is 31311001021037. The next prime is 31311001021123. The reversal of 31311001021103 is 30112010011313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31311001021103 - 2²² = 31310996826799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311001021123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655500510551 + 15655500510552.

It is an arithmetic number, because the mean of its divisors is an integer number (15655500510552).

Almost surely, 2^{31311001021103} is an apocalyptic number.

31311001021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311001021103 is an equidigital number, since it uses as much as digits as its factorization.

31311001021103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31311001021103 its reverse (30112010011313), we get a palindrome (61423011032416).

The spelling of 31311001021103 in words is "thirty-one trillion, three hundred eleven billion, one million, twenty-one thousand, one hundred three".