222121120222009 has 8 divisors (see below), whose sum is σ = 224411933051208. Its totient is φ = 219830325849600.

The previous prime is 222121120221943. The next prime is 222121120222039. The reversal of 222121120222009 is 900222021121222.

222121120222009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 104325770025 + 222016794451984 = 322995^2 + 14900228^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222121120222009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121120222039) 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, 20267559 + ... + 29240659.

It is an arithmetic number, because the mean of its divisors is an integer number (28051491631401).

Almost surely, 2^{222121120222009} is an apocalyptic number.

It is an amenable number.

222121120222009 is a deficient number, since it is larger than the sum of its proper divisors (2290812829199).

222121120222009 is an equidigital number, since it uses as much as digits as its factorization.

222121120222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9228395.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 222121120222009 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, nine".