11772121 has 2 divisors, whose sum is σ = 11772122. Its totient is φ = 11772120.

The previous prime is 11772097. The next prime is 11772133. The reversal of 11772121 is 12127711.

11772121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11316496 + 455625 = 3364^2 + 675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11772121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11772092 and 11772101.

It is not a weakly prime, because it can be changed into another prime (11772161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5886060 + 5886061.

It is an arithmetic number, because the mean of its divisors is an integer number (5886061).

Almost surely, 2^11772121 is an apocalyptic number.

It is an amenable number.

11772121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11772121 is an equidigital number, since it uses as much as digits as its factorization.

11772121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196, while the sum is 22.

The square root of 11772121 is about 3431.0524624377. The cubic root of 11772121 is about 227.4843752100.

Adding to 11772121 its reverse (12127711), we get a palindrome (23899832).

The spelling of 11772121 in words is "eleven million, seven hundred seventy-two thousand, one hundred twenty-one".