11611121 has 2 divisors, whose sum is σ = 11611122. Its totient is φ = 11611120.

The previous prime is 11611097. The next prime is 11611133. The reversal of 11611121 is 12111611.

It is a m-pointer prime, because the next prime (11611133) can be obtained adding 11611121 to its product of digits (12).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 1600225 = 3164^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 11611121 - 2⁶ = 11611057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11611096 and 11611105.

It is not a weakly prime, because it can be changed into another prime (11611151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805560 + 5805561.

It is an arithmetic number, because the mean of its divisors is an integer number (5805561).

Almost surely, 2^11611121 is an apocalyptic number.

It is an amenable number.

11611121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611121 is an equidigital number, since it uses as much as digits as its factorization.

11611121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 14.

The square root of 11611121 is about 3407.5095010873. The cubic root of 11611121 is about 226.4425569902.

Adding to 11611121 its reverse (12111611), we get a palindrome (23722732).

The spelling of 11611121 in words is "eleven million, six hundred eleven thousand, one hundred twenty-one".