221222130 has 32 divisors (see below), whose sum is σ = 558878400. Its totient is φ = 55887552.

The previous prime is 221222123. The next prime is 221222153. The reversal of 221222130 is 31222122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193485 + ... + 194624.

It is an arithmetic number, because the mean of its divisors is an integer number (17464950).

Almost surely, 2^221222130 is an apocalyptic number.

221222130 is an abundant number, since it is smaller than the sum of its proper divisors (337656270).

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

221222130 is a wasteful number, since it uses less digits than its factorization.

221222130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388138.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221222130 is about 14873.5379113377. The cubic root of 221222130 is about 604.7968536814.

Adding to 221222130 its reverse (31222122), we get a palindrome (252444252).

It can be divided in two parts, 2212 and 22130, that added together give a palindrome (24342).

The spelling of 221222130 in words is "two hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty".