221022210 has 16 divisors (see below), whose sum is σ = 530453376. Its totient is φ = 58939248.

The previous prime is 221022209. The next prime is 221022211. The reversal of 221022210 is 12220122.

It is an interprime number because it is at equal distance from previous prime (221022209) and next prime (221022211).

It is not an unprimeable number, because it can be changed into a prime (221022211) 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, 3683674 + ... + 3683733.

It is an arithmetic number, because the mean of its divisors is an integer number (33153336).

Almost surely, 2^221022210 is an apocalyptic number.

221022210 is an abundant number, since it is smaller than the sum of its proper divisors (309431166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221022210 is a wasteful number, since it uses less digits than its factorization.

221022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367417.

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

The square root of 221022210 is about 14866.8157316892. The cubic root of 221022210 is about 604.6146123779.

Adding to 221022210 its reverse (12220122), we get a palindrome (233242332).

The spelling of 221022210 in words is "two hundred twenty-one million, twenty-two thousand, two hundred ten".