22212312191 has 2 divisors, whose sum is σ = 22212312192. Its totient is φ = 22212312190.

The previous prime is 22212312139. The next prime is 22212312247. The reversal of 22212312191 is 19121321222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212312191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22212312191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212312131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106156095 + 11106156096.

It is an arithmetic number, because the mean of its divisors is an integer number (11106156096).

Almost surely, 2^22212312191 is an apocalyptic number.

22212312191 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212312191 is an equidigital number, since it uses as much as digits as its factorization.

22212312191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The spelling of 22212312191 in words is "twenty-two billion, two hundred twelve million, three hundred twelve thousand, one hundred ninety-one".