11251353221 has 2 divisors, whose sum is σ = 11251353222. Its totient is φ = 11251353220.

The previous prime is 11251353163. The next prime is 11251353227. The reversal of 11251353221 is 12235315211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5850720100 + 5400633121 = 76490^2 + 73489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11251353221 - 2¹⁰ = 11251352197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11251353227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5625676610 + 5625676611.

It is an arithmetic number, because the mean of its divisors is an integer number (5625676611).

Almost surely, 2^11251353221 is an apocalyptic number.

It is an amenable number.

11251353221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11251353221 is an equidigital number, since it uses as much as digits as its factorization.

11251353221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

Adding to 11251353221 its reverse (12235315211), we get a palindrome (23486668432).

The spelling of 11251353221 in words is "eleven billion, two hundred fifty-one million, three hundred fifty-three thousand, two hundred twenty-one".