31201020079 has 2 divisors, whose sum is σ = 31201020080. Its totient is φ = 31201020078.

The previous prime is 31201020043. The next prime is 31201020143. The reversal of 31201020079 is 97002010213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31201020079 - 2⁹ = 31201019567 is a prime.

It is a super-2 number, since 2×31201020079² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201020029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600510039 + 15600510040.

It is an arithmetic number, because the mean of its divisors is an integer number (15600510040).

Almost surely, 2^31201020079 is an apocalyptic number.

31201020079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201020079 is an equidigital number, since it uses as much as digits as its factorization.

31201020079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 31201020079 in words is "thirty-one billion, two hundred one million, twenty thousand, seventy-nine".