11562121 has 2 divisors, whose sum is σ = 11562122. Its totient is φ = 11562120.

The previous prime is 11562119. The next prime is 11562157. The reversal of 11562121 is 12126511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 1392400 = 3189^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 11562121 - 2¹ = 11562119 is a prime.

Together with 11562119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11562181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5781060 + 5781061.

It is an arithmetic number, because the mean of its divisors is an integer number (5781061).

Almost surely, 2^11562121 is an apocalyptic number.

It is an amenable number.

11562121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11562121 is an equidigital number, since it uses as much as digits as its factorization.

11562121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 11562121 is about 3400.3118974588. The cubic root of 11562121 is about 226.1235717041.

Adding to 11562121 its reverse (12126511), we get a palindrome (23688632).

The spelling of 11562121 in words is "eleven million, five hundred sixty-two thousand, one hundred twenty-one".