12222222222251 has 2 divisors, whose sum is σ = 12222222222252. Its totient is φ = 12222222222250.

The previous prime is 12222222222211. The next prime is 12222222222253. The reversal of 12222222222251 is 15222222222221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12222222222251 - 2⁶ = 12222222222187 is a prime.

Together with 12222222222253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12222222222253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111111111125 + 6111111111126.

It is an arithmetic number, because the mean of its divisors is an integer number (6111111111126).

Almost surely, 2^{12222222222251} is an apocalyptic number.

12222222222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222222222251 is an equidigital number, since it uses as much as digits as its factorization.

12222222222251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 29.

Adding to 12222222222251 its reverse (15222222222221), we get a palindrome (27444444444472).

The spelling of 12222222222251 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred fifty-one".