10101121110991 has 2 divisors, whose sum is σ = 10101121110992. Its totient is φ = 10101121110990.

The previous prime is 10101121110923. The next prime is 10101121111051. The reversal of 10101121110991 is 19901112110101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10101121110991 - 2¹⁹ = 10101120586703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10101121110191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050560555495 + 5050560555496.

It is an arithmetic number, because the mean of its divisors is an integer number (5050560555496).

Almost surely, 2^{10101121110991} is an apocalyptic number.

10101121110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101121110991 is an equidigital number, since it uses as much as digits as its factorization.

10101121110991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 28.

The spelling of 10101121110991 in words is "ten trillion, one hundred one billion, one hundred twenty-one million, one hundred ten thousand, nine hundred ninety-one".