31213212011099 has 2 divisors, whose sum is σ = 31213212011100. Its totient is φ = 31213212011098.

The previous prime is 31213212011087. The next prime is 31213212011119. The reversal of 31213212011099 is 99011021231213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31213212011099 - 2⁴⁰ = 30113700383323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31213212011299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606606005549 + 15606606005550.

It is an arithmetic number, because the mean of its divisors is an integer number (15606606005550).

Almost surely, 2^{31213212011099} is an apocalyptic number.

31213212011099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213212011099 is an equidigital number, since it uses as much as digits as its factorization.

31213212011099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 31213212011099 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twelve million, eleven thousand, ninety-nine".