222002021 has 8 divisors (see below), whose sum is σ = 225904704. Its totient is φ = 218116800.

The previous prime is 222001987. The next prime is 222002051. The reversal of 222002021 is 120200222.

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-222002021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222001993 and 222002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002051) 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, 22736 + ... + 30998.

It is an arithmetic number, because the mean of its divisors is an integer number (28238088).

Almost surely, 2^222002021 is an apocalyptic number.

It is an amenable number.

222002021 is a deficient number, since it is larger than the sum of its proper divisors (3902683).

222002021 is an equidigital number, since it uses as much as digits as its factorization.

222002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 222002021 is about 14899.7322459164. The cubic root of 222002021 is about 605.5067320710.

Adding to 222002021 its reverse (120200222), we get a palindrome (342202243).

The spelling of 222002021 in words is "two hundred twenty-two million, two thousand, twenty-one".