2120045491 has 2 divisors, whose sum is σ = 2120045492. Its totient is φ = 2120045490.

The previous prime is 2120045471. The next prime is 2120045533. The reversal of 2120045491 is 1945400212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120045491 - 2¹⁹ = 2119521203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120045471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060022745 + 1060022746.

It is an arithmetic number, because the mean of its divisors is an integer number (1060022746).

Almost surely, 2^2120045491 is an apocalyptic number.

2120045491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120045491 is an equidigital number, since it uses as much as digits as its factorization.

2120045491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2120045491 is about 46043.9517309277. The cubic root of 2120045491 is about 1284.6408461969.

The spelling of 2120045491 in words is "two billion, one hundred twenty million, forty-five thousand, four hundred ninety-one".