22221112210909 has 2 divisors, whose sum is σ = 22221112210910. Its totient is φ = 22221112210908.

The previous prime is 22221112210873. The next prime is 22221112210933. The reversal of 22221112210909 is 90901221112222.

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., 21768616519225 + 452495691684 = 4665685^2 + 672678^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221112210909 - 2²⁵ = 22221078656477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221112210949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110556105454 + 11110556105455.

It is an arithmetic number, because the mean of its divisors is an integer number (11110556105455).

Almost surely, 2^{22221112210909} is an apocalyptic number.

It is an amenable number.

22221112210909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221112210909 is an equidigital number, since it uses as much as digits as its factorization.

22221112210909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 22221112210909 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, nine hundred nine".