2125262521 has 2 divisors, whose sum is σ = 2125262522. Its totient is φ = 2125262520.

The previous prime is 2125262519. The next prime is 2125262527. The reversal of 2125262521 is 1252625212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234538496 + 890724025 = 35136^2 + 29845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125262521 - 2¹ = 2125262519 is a prime.

Together with 2125262519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2125262521.

It is not a weakly prime, because it can be changed into another prime (2125262527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062631260 + 1062631261.

It is an arithmetic number, because the mean of its divisors is an integer number (1062631261).

Almost surely, 2^2125262521 is an apocalyptic number.

It is an amenable number.

2125262521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125262521 is an equidigital number, since it uses as much as digits as its factorization.

2125262521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 28.

The square root of 2125262521 is about 46100.5696385630. The cubic root of 2125262521 is about 1285.6937355346.

Adding to 2125262521 its reverse (1252625212), we get a palindrome (3377887733).

The spelling of 2125262521 in words is "two billion, one hundred twenty-five million, two hundred sixty-two thousand, five hundred twenty-one".