22042115209 has 2 divisors, whose sum is σ = 22042115210. Its totient is φ = 22042115208.

The previous prime is 22042115203. The next prime is 22042115237. The reversal of 22042115209 is 90251124022.

It is an a-pointer prime, because the next prime (22042115237) can be obtained adding 22042115209 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15838977609 + 6203137600 = 125853^2 + 78760^2 .

It is a cyclic number.

It is not a de Polignac number, because 22042115209 - 2³ = 22042115201 is a prime.

It is a super-2 number, since 2×22042115209² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22042115201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11021057604 + 11021057605.

It is an arithmetic number, because the mean of its divisors is an integer number (11021057605).

Almost surely, 2^22042115209 is an apocalyptic number.

It is an amenable number.

22042115209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22042115209 is an equidigital number, since it uses as much as digits as its factorization.

22042115209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 22042115209 in words is "twenty-two billion, forty-two million, one hundred fifteen thousand, two hundred nine".