222121112209 has 8 divisors (see below), whose sum is σ = 235193167080. Its totient is φ = 209049735936.

The previous prime is 222121112201. The next prime is 222121112231. The reversal of 222121112209 is 902211121222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 172735828225 + 49385283984 = 415615^2 + 222228^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121112209 - 2³ = 222121112201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121112201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605487 + ... + 900475.

It is an arithmetic number, because the mean of its divisors is an integer number (29399145885).

Almost surely, 2^222121112209 is an apocalyptic number.

It is an amenable number.

222121112209 is a deficient number, since it is larger than the sum of its proper divisors (13072054871).

222121112209 is a wasteful number, since it uses less digits than its factorization.

222121112209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339299.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 222121112209 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred nine".