22221222212191 has 2 divisors, whose sum is σ = 22221222212192. Its totient is φ = 22221222212190.

The previous prime is 22221222212183. The next prime is 22221222212201. The reversal of 22221222212191 is 19121222212222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221222212191 - 2³ = 22221222212183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221222212291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110611106095 + 11110611106096.

It is an arithmetic number, because the mean of its divisors is an integer number (11110611106096).

Almost surely, 2^{22221222212191} is an apocalyptic number.

22221222212191 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221222212191 is an equidigital number, since it uses as much as digits as its factorization.

22221222212191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

Adding to 22221222212191 its sum of digits (31), we get a palindrome (22221222212222).

The spelling of 22221222212191 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred ninety-one".