31201221795899 has 2 divisors, whose sum is σ = 31201221795900. Its totient is φ = 31201221795898.

The previous prime is 31201221795889. The next prime is 31201221795907. The reversal of 31201221795899 is 99859712210213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31201221795899 - 2⁴ = 31201221795883 is a prime.

It is not a weakly prime, because it can be changed into another prime (31201221795839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600610897949 + 15600610897950.

It is an arithmetic number, because the mean of its divisors is an integer number (15600610897950).

Almost surely, 2^{31201221795899} is an apocalyptic number.

31201221795899 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201221795899 is an equidigital number, since it uses as much as digits as its factorization.

31201221795899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 31201221795899 in words is "thirty-one trillion, two hundred one billion, two hundred twenty-one million, seven hundred ninety-five thousand, eight hundred ninety-nine".