120100210991 has 2 divisors, whose sum is σ = 120100210992. Its totient is φ = 120100210990.

The previous prime is 120100210933. The next prime is 120100211027. The reversal of 120100210991 is 199012001021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120100210991 - 2¹⁰ = 120100209967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120100210991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120100210291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050105495 + 60050105496.

It is an arithmetic number, because the mean of its divisors is an integer number (60050105496).

Almost surely, 2^120100210991 is an apocalyptic number.

120100210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

120100210991 is an equidigital number, since it uses as much as digits as its factorization.

120100210991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 120100210991 in words is "one hundred twenty billion, one hundred million, two hundred ten thousand, nine hundred ninety-one".