31102321109 has 2 divisors, whose sum is σ = 31102321110. Its totient is φ = 31102321108.

The previous prime is 31102321087. The next prime is 31102321121. The reversal of 31102321109 is 90112320113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30084902500 + 1017418609 = 173450^2 + 31897^2 .

It is a cyclic number.

It is not a de Polignac number, because 31102321109 - 2²⁰ = 31101272533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31102321309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551160554 + 15551160555.

It is an arithmetic number, because the mean of its divisors is an integer number (15551160555).

Almost surely, 2^31102321109 is an apocalyptic number.

It is an amenable number.

31102321109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102321109 is an equidigital number, since it uses as much as digits as its factorization.

31102321109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 31102321109 in words is "thirty-one billion, one hundred two million, three hundred twenty-one thousand, one hundred nine".