11221222212251 has 2 divisors, whose sum is σ = 11221222212252. Its totient is φ = 11221222212250.

The previous prime is 11221222212223. The next prime is 11221222212253. The reversal of 11221222212251 is 15221222212211.

11221222212251 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 11221222212251 - 2¹⁴ = 11221222195867 is a prime.

Together with 11221222212253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221222212251.

It is not a weakly prime, because it can be changed into another prime (11221222212253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610611106125 + 5610611106126.

It is an arithmetic number, because the mean of its divisors is an integer number (5610611106126).

Almost surely, 2^{11221222212251} is an apocalyptic number.

11221222212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221222212251 is an equidigital number, since it uses as much as digits as its factorization.

11221222212251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 26.

Adding to 11221222212251 its reverse (15221222212211), we get a palindrome (26442444424462).

The spelling of 11221222212251 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred fifty-one".