2501225021 has 2 divisors, whose sum is σ = 2501225022. Its totient is φ = 2501225020.

The previous prime is 2501224969. The next prime is 2501225047. The reversal of 2501225021 is 1205221052.

It is a happy number.

2501225021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2326615225 + 174609796 = 48235^2 + 13214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501225021 - 2²² = 2497030717 is a prime.

It is a super-2 number, since 2×2501225021² = 12512253211352900882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2501224984 and 2501225002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501225081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250612510 + 1250612511.

It is an arithmetic number, because the mean of its divisors is an integer number (1250612511).

Almost surely, 2^2501225021 is an apocalyptic number.

It is an amenable number.

2501225021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501225021 is an equidigital number, since it uses as much as digits as its factorization.

2501225021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2501225021 is about 50012.2487096911. The cubic root of 2501225021 is about 1357.4304533376.

Adding to 2501225021 its reverse (1205221052), we get a palindrome (3706446073).

The spelling of 2501225021 in words is "two billion, five hundred one million, two hundred twenty-five thousand, twenty-one".