10101310991 has 2 divisors, whose sum is σ = 10101310992. Its totient is φ = 10101310990.

The previous prime is 10101310981. The next prime is 10101311021. The reversal of 10101310991 is 19901310101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10101310991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10101310991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10101310981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050655495 + 5050655496.

It is an arithmetic number, because the mean of its divisors is an integer number (5050655496).

Almost surely, 2^10101310991 is an apocalyptic number.

10101310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101310991 is an equidigital number, since it uses as much as digits as its factorization.

10101310991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 26.

The spelling of 10101310991 in words is "ten billion, one hundred one million, three hundred ten thousand, nine hundred ninety-one".