121611253 has 2 divisors, whose sum is σ = 121611254. Its totient is φ = 121611252.

The previous prime is 121611241. The next prime is 121611271. The reversal of 121611253 is 352116121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90497169 + 31114084 = 9513^2 + 5578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121611253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121611223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60805626 + 60805627.

It is an arithmetic number, because the mean of its divisors is an integer number (60805627).

Almost surely, 2^121611253 is an apocalyptic number.

It is an amenable number.

121611253 is a deficient number, since it is larger than the sum of its proper divisors (1).

121611253 is an equidigital number, since it uses as much as digits as its factorization.

121611253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 121611253 is about 11027.7492263834. The cubic root of 121611253 is about 495.4402137731.

Adding to 121611253 its reverse (352116121), we get a palindrome (473727374).

The spelling of 121611253 in words is "one hundred twenty-one million, six hundred eleven thousand, two hundred fifty-three".