22194679921109 has 2 divisors, whose sum is σ = 22194679921110. Its totient is φ = 22194679921108.

The previous prime is 22194679921027. The next prime is 22194679921163. The reversal of 22194679921109 is 90112997649122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21731493507025 + 463186414084 = 4661705^2 + 680578^2 .

It is a cyclic number.

It is not a de Polignac number, because 22194679921109 - 2¹² = 22194679917013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22194679921009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11097339960554 + 11097339960555.

It is an arithmetic number, because the mean of its divisors is an integer number (11097339960555).

Almost surely, 2^{22194679921109} is an apocalyptic number.

It is an amenable number.

22194679921109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22194679921109 is an equidigital number, since it uses as much as digits as its factorization.

22194679921109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 22194679921109 in words is "twenty-two trillion, one hundred ninety-four billion, six hundred seventy-nine million, nine hundred twenty-one thousand, one hundred nine".