2120518901 has 2 divisors, whose sum is σ = 2120518902. Its totient is φ = 2120518900.

The previous prime is 2120518867. The next prime is 2120518913. The reversal of 2120518901 is 1098150212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1766100625 + 354418276 = 42025^2 + 18826^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120518901 - 2¹⁰ = 2120517877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120518501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060259450 + 1060259451.

It is an arithmetic number, because the mean of its divisors is an integer number (1060259451).

Almost surely, 2^2120518901 is an apocalyptic number.

It is an amenable number.

2120518901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120518901 is an equidigital number, since it uses as much as digits as its factorization.

2120518901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 2120518901 is about 46049.0922928998. The cubic root of 2120518901 is about 1284.7364599566.

The spelling of 2120518901 in words is "two billion, one hundred twenty million, five hundred eighteen thousand, nine hundred one".