10201105991 has 2 divisors, whose sum is σ = 10201105992. Its totient is φ = 10201105990.

The previous prime is 10201105939. The next prime is 10201105997. The reversal of 10201105991 is 19950110201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10201105991 - 2²² = 10196911687 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 (10201105997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100552995 + 5100552996.

It is an arithmetic number, because the mean of its divisors is an integer number (5100552996).

Almost surely, 2^10201105991 is an apocalyptic number.

10201105991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201105991 is an equidigital number, since it uses as much as digits as its factorization.

10201105991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 29.

It can be divided in two parts, 1020 and 1105991, that added together give a palindrome (1107011).

The spelling of 10201105991 in words is "ten billion, two hundred one million, one hundred five thousand, nine hundred ninety-one".