2120089991 has 2 divisors, whose sum is σ = 2120089992. Its totient is φ = 2120089990.

The previous prime is 2120089963. The next prime is 2120090023. The reversal of 2120089991 is 1999800212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120089991 - 2⁶ = 2120089927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120089591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060044995 + 1060044996.

It is an arithmetic number, because the mean of its divisors is an integer number (1060044996).

Almost surely, 2^2120089991 is an apocalyptic number.

2120089991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120089991 is an equidigital number, since it uses as much as digits as its factorization.

2120089991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 2120089991 is about 46044.4349623274. The cubic root of 2120089991 is about 1284.6498343873.

The spelling of 2120089991 in words is "two billion, one hundred twenty million, eighty-nine thousand, nine hundred ninety-one".