2122815901 has 2 divisors, whose sum is σ = 2122815902. Its totient is φ = 2122815900.

The previous prime is 2122815887. The next prime is 2122815913. The reversal of 2122815901 is 1095182212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198959876 + 923856025 = 34626^2 + 30395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122815901 - 2⁹ = 2122815389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122815601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061407950 + 1061407951.

It is an arithmetic number, because the mean of its divisors is an integer number (1061407951).

Almost surely, 2^2122815901 is an apocalyptic number.

It is an amenable number.

2122815901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122815901 is an equidigital number, since it uses as much as digits as its factorization.

2122815901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 2122815901 is about 46074.0263163531. The cubic root of 2122815901 is about 1285.2001789613.

The spelling of 2122815901 in words is "two billion, one hundred twenty-two million, eight hundred fifteen thousand, nine hundred one".