12221120012251 has 2 divisors, whose sum is σ = 12221120012252. Its totient is φ = 12221120012250.

The previous prime is 12221120012183. The next prime is 12221120012261. The reversal of 12221120012251 is 15221002112221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221120012251 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221120012261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110560006125 + 6110560006126.

It is an arithmetic number, because the mean of its divisors is an integer number (6110560006126).

Almost surely, 2^{12221120012251} is an apocalyptic number.

12221120012251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221120012251 is an equidigital number, since it uses as much as digits as its factorization.

12221120012251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 12221120012251 its reverse (15221002112221), we get a palindrome (27442122124472).

The spelling of 12221120012251 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, twelve thousand, two hundred fifty-one".