12116551 has 2 divisors, whose sum is σ = 12116552. Its totient is φ = 12116550.

The previous prime is 12116539. The next prime is 12116557. The reversal of 12116551 is 15561121.

It is a happy number.

12116551 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 is a cyclic number.

It is not a de Polignac number, because 12116551 - 2¹³ = 12108359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12116557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058275 + 6058276.

It is an arithmetic number, because the mean of its divisors is an integer number (6058276).

Almost surely, 2^12116551 is an apocalyptic number.

12116551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12116551 is an equidigital number, since it uses as much as digits as its factorization.

12116551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 22.

The square root of 12116551 is about 3480.8836521780. The cubic root of 12116551 is about 229.6816705232.

Adding to 12116551 its reverse (15561121), we get a palindrome (27677672).

The spelling of 12116551 in words is "twelve million, one hundred sixteen thousand, five hundred fifty-one".