2521021117 has 2 divisors, whose sum is σ = 2521021118. Its totient is φ = 2521021116.

The previous prime is 2521021051. The next prime is 2521021121. The reversal of 2521021117 is 7111201252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288379236 + 1232641881 = 35894^2 + 35109^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521021117 - 2¹¹ = 2521019069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521021187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260510558 + 1260510559.

It is an arithmetic number, because the mean of its divisors is an integer number (1260510559).

Almost surely, 2^2521021117 is an apocalyptic number.

It is an amenable number.

2521021117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521021117 is an equidigital number, since it uses as much as digits as its factorization.

2521021117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 2521021117 is about 50209.7711307271. The cubic root of 2521021117 is about 1361.0022019186.

Adding to 2521021117 its reverse (7111201252), we get a palindrome (9632222369).

The spelling of 2521021117 in words is "two billion, five hundred twenty-one million, twenty-one thousand, one hundred seventeen".