2501260021 has 4 divisors (see below), whose sum is σ = 2693664652. Its totient is φ = 2308855392.

The previous prime is 2501260019. The next prime is 2501260039. The reversal of 2501260021 is 1200621052.

2501260021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108680625 + 2392579396 = 10425^2 + 48914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501260021 - 2¹ = 2501260019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501260081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96202296 + ... + 96202321.

It is an arithmetic number, because the mean of its divisors is an integer number (673416163).

Almost surely, 2^2501260021 is an apocalyptic number.

It is an amenable number.

2501260021 is a deficient number, since it is larger than the sum of its proper divisors (192404631).

2501260021 is a wasteful number, since it uses less digits than its factorization.

2501260021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192404630.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2501260021 is about 50012.5986227470. The cubic root of 2501260021 is about 1357.4367848810.

Adding to 2501260021 its reverse (1200621052), we get a palindrome (3701881073).

The spelling of 2501260021 in words is "two billion, five hundred one million, two hundred sixty thousand, twenty-one".