2521101901 has 2 divisors, whose sum is σ = 2521101902. Its totient is φ = 2521101900.

The previous prime is 2521101841. The next prime is 2521101923. The reversal of 2521101901 is 1091011252.

2521101901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2521101923) can be obtained adding 2521101901 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2364876900 + 156225001 = 48630^2 + 12499^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521101901 - 2²¹ = 2519004749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521101971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260550950 + 1260550951.

It is an arithmetic number, because the mean of its divisors is an integer number (1260550951).

Almost surely, 2^2521101901 is an apocalyptic number.

It is an amenable number.

2521101901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521101901 is an equidigital number, since it uses as much as digits as its factorization.

2521101901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 2521101901 is about 50210.5755892123. The cubic root of 2521101901 is about 1361.0167391534.

The spelling of 2521101901 in words is "two billion, five hundred twenty-one million, one hundred one thousand, nine hundred one".