31120220331979 has 2 divisors, whose sum is σ = 31120220331980. Its totient is φ = 31120220331978.

The previous prime is 31120220331929. The next prime is 31120220332049. The reversal of 31120220331979 is 97913302202113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120220331979 - 2³⁹ = 30570464518091 is a prime.

It is a super-2 number, since 2×31120220331979² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31120220331929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560110165989 + 15560110165990.

It is an arithmetic number, because the mean of its divisors is an integer number (15560110165990).

Almost surely, 2^{31120220331979} is an apocalyptic number.

31120220331979 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120220331979 is an equidigital number, since it uses as much as digits as its factorization.

31120220331979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 31120220331979 in words is "thirty-one trillion, one hundred twenty billion, two hundred twenty million, three hundred thirty-one thousand, nine hundred seventy-nine".