2251121 has 2 divisors, whose sum is σ = 2251122. Its totient is φ = 2251120.

The previous prime is 2251111. The next prime is 2251129. The reversal of 2251121 is 1211522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 390625 = 1364^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251121 - 2⁶ = 2251057 is a prime.

It is a super-3 number, since 3×2251121³ = 34222976013706333683, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2251096 and 2251105.

It is not a weakly prime, because it can be changed into another prime (2251129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125560 + 1125561.

It is an arithmetic number, because the mean of its divisors is an integer number (1125561).

2^2251121 is an apocalyptic number.

It is an amenable number.

2251121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251121 is an equidigital number, since it uses as much as digits as its factorization.

2251121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40, while the sum is 14.

The square root of 2251121 is about 1500.3736201360. The cubic root of 2251121 is about 131.0588279574.

Adding to 2251121 its reverse (1211522), we get a palindrome (3462643).

The spelling of 2251121 in words is "two million, two hundred fifty-one thousand, one hundred twenty-one".