222002121 has 8 divisors (see below), whose sum is σ = 322912224. Its totient is φ = 134546720.

The previous prime is 222002113. The next prime is 222002147. The reversal of 222002121 is 121200222.

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

It is not a de Polignac number, because 222002121 - 2³ = 222002113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222002097 and 222002106.

It is not an unprimeable number, because it can be changed into a prime (222002101) 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, 3363636 + ... + 3363701.

It is an arithmetic number, because the mean of its divisors is an integer number (40364028).

Almost surely, 2^222002121 is an apocalyptic number.

It is an amenable number.

222002121 is a deficient number, since it is larger than the sum of its proper divisors (100910103).

222002121 is a wasteful number, since it uses less digits than its factorization.

222002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727351.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 222002121 is about 14899.7356016810. The cubic root of 222002121 is about 605.5068229871.

Adding to 222002121 its reverse (121200222), we get a palindrome (343202343).

The spelling of 222002121 in words is "two hundred twenty-two million, two thousand, one hundred twenty-one".