122212609 has 6 divisors (see below), whose sum is σ = 129824774. Its totient is φ = 115023360.

The previous prime is 122212589. The next prime is 122212621. The reversal of 122212609 is 906212221.

It can be written as a sum of positive squares in 3 ways, for example, as 42289009 + 79923600 = 6503^2 + 8940^2 .

It is not a de Polignac number, because 122212609 - 2⁵ = 122212577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122212669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211152 + ... + 211729.

Almost surely, 2^122212609 is an apocalyptic number.

It is an amenable number.

122212609 is a deficient number, since it is larger than the sum of its proper divisors (7612165).

122212609 is an equidigital number, since it uses as much as digits as its factorization.

122212609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422915 (or 422898 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 122212609 is about 11054.9811849682. The cubic root of 122212609 is about 496.2555062023.

It can be divided in two parts, 1222 and 12609, that added together give a palindrome (13831).

The spelling of 122212609 in words is "one hundred twenty-two million, two hundred twelve thousand, six hundred nine".