201120120991 has 2 divisors, whose sum is σ = 201120120992. Its totient is φ = 201120120990.

The previous prime is 201120120989. The next prime is 201120121021. The reversal of 201120120991 is 199021021102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201120120991 - 2¹ = 201120120989 is a prime.

Together with 201120120989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201120120911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560060495 + 100560060496.

It is an arithmetic number, because the mean of its divisors is an integer number (100560060496).

Almost surely, 2^201120120991 is an apocalyptic number.

201120120991 is a deficient number, since it is larger than the sum of its proper divisors (1).

201120120991 is an equidigital number, since it uses as much as digits as its factorization.

201120120991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 201120120991 in words is "two hundred one billion, one hundred twenty million, one hundred twenty thousand, nine hundred ninety-one".