312121331099 has 2 divisors, whose sum is σ = 312121331100. Its totient is φ = 312121331098.

The previous prime is 312121331089. The next prime is 312121331141. The reversal of 312121331099 is 990133121213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312121331099 is a prime.

It is not a weakly prime, because it can be changed into another prime (312121331069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060665549 + 156060665550.

It is an arithmetic number, because the mean of its divisors is an integer number (156060665550).

Almost surely, 2^312121331099 is an apocalyptic number.

312121331099 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121331099 is an equidigital number, since it uses as much as digits as its factorization.

312121331099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The spelling of 312121331099 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred thirty-one thousand, ninety-nine".