221123130 has 16 divisors (see below), whose sum is σ = 530695584. Its totient is φ = 58966160.

The previous prime is 221123117. The next prime is 221123143. The reversal of 221123130 is 31321122.

It is an interprime number because it is at equal distance from previous prime (221123117) and next prime (221123143).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685356 + ... + 3685415.

It is an arithmetic number, because the mean of its divisors is an integer number (33168474).

Almost surely, 2^221123130 is an apocalyptic number.

221123130 is an abundant number, since it is smaller than the sum of its proper divisors (309572454).

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

221123130 is a wasteful number, since it uses less digits than its factorization.

221123130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370781.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221123130 is about 14870.2094807034. The cubic root of 221123130 is about 604.7066218672.

Adding to 221123130 its reverse (31321122), we get a palindrome (252444252).

The spelling of 221123130 in words is "two hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty".