10120312991 has 2 divisors, whose sum is σ = 10120312992. Its totient is φ = 10120312990.

The previous prime is 10120312967. The next prime is 10120312999. The reversal of 10120312991 is 19921302101.

10120312991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10120312991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10120312999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060156495 + 5060156496.

It is an arithmetic number, because the mean of its divisors is an integer number (5060156496).

Almost surely, 2^10120312991 is an apocalyptic number.

10120312991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120312991 is an equidigital number, since it uses as much as digits as its factorization.

10120312991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 10120312991 in words is "ten billion, one hundred twenty million, three hundred twelve thousand, nine hundred ninety-one".