11955121 has 2 divisors, whose sum is σ = 11955122. Its totient is φ = 11955120.

The previous prime is 11955109. The next prime is 11955133. The reversal of 11955121 is 12155911.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (11955109) and next prime (11955133).

It can be written as a sum of positive squares in only one way, i.e., 6195121 + 5760000 = 2489^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11955121 - 2⁵ = 11955089 is a prime.

It is not a weakly prime, because it can be changed into another prime (11955421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977560 + 5977561.

It is an arithmetic number, because the mean of its divisors is an integer number (5977561).

Almost surely, 2^11955121 is an apocalyptic number.

It is an amenable number.

11955121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11955121 is an equidigital number, since it uses as much as digits as its factorization.

11955121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 25.

The square root of 11955121 is about 3457.6178215644. The cubic root of 11955121 is about 228.6570829092.

The spelling of 11955121 in words is "eleven million, nine hundred fifty-five thousand, one hundred twenty-one".