221220002 has 32 divisors (see below), whose sum is σ = 356400000. Its totient is φ = 102681216.

The previous prime is 221219989. The next prime is 221220007. The reversal of 221220002 is 200022122.

221220002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221220007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503699 + ... + 504137.

It is an arithmetic number, because the mean of its divisors is an integer number (11137500).

Almost surely, 2^221220002 is an apocalyptic number.

221220002 is a deficient number, since it is larger than the sum of its proper divisors (135179998).

221220002 is a wasteful number, since it uses less digits than its factorization.

221220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

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

The square root of 221220002 is about 14873.4663747225. The cubic root of 221220002 is about 604.7949144362.

Adding to 221220002 its reverse (200022122), we get a palindrome (421242124).

The spelling of 221220002 in words is "two hundred twenty-one million, two hundred twenty thousand, two".