12216751 has 2 divisors, whose sum is σ = 12216752. Its totient is φ = 12216750.

The previous prime is 12216731. The next prime is 12216767. The reversal of 12216751 is 15761221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12216751 - 2⁵ = 12216719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12216731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108375 + 6108376.

It is an arithmetic number, because the mean of its divisors is an integer number (6108376).

Almost surely, 2^12216751 is an apocalyptic number.

12216751 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216751 is an equidigital number, since it uses as much as digits as its factorization.

12216751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 12216751 is about 3495.2469154553. The cubic root of 12216751 is about 230.3130645421.

Adding to 12216751 its reverse (15761221), we get a palindrome (27977972).

The spelling of 12216751 in words is "twelve million, two hundred sixteen thousand, seven hundred fifty-one".