22211111111251 has 2 divisors, whose sum is σ = 22211111111252. Its totient is φ = 22211111111250.

The previous prime is 22211111111213. The next prime is 22211111111281. The reversal of 22211111111251 is 15211111111222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22211111111251 - 2¹⁹ = 22211110586963 is a prime.

It is not a weakly prime, because it can be changed into another prime (22211111111281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105555555625 + 11105555555626.

It is an arithmetic number, because the mean of its divisors is an integer number (11105555555626).

Almost surely, 2^{22211111111251} is an apocalyptic number.

22211111111251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211111111251 is an equidigital number, since it uses as much as digits as its factorization.

22211111111251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 22.

Adding to 22211111111251 its reverse (15211111111222), we get a palindrome (37422222222473).

The spelling of 22211111111251 in words is "twenty-two trillion, two hundred eleven billion, one hundred eleven million, one hundred eleven thousand, two hundred fifty-one".