221111130 has 64 divisors (see below), whose sum is σ = 540334080. Its totient is φ = 57900096.

The previous prime is 221111123. The next prime is 221111131. The reversal of 221111130 is 31111122.

It is not an unprimeable number, because it can be changed into a prime (221111131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503451 + ... + 503889.

It is an arithmetic number, because the mean of its divisors is an integer number (8442720).

Almost surely, 2^221111130 is an apocalyptic number.

221111130 is an abundant number, since it is smaller than the sum of its proper divisors (319222950).

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

221111130 is a wasteful number, since it uses less digits than its factorization.

221111130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

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

The square root of 221111130 is about 14869.8059839394. The cubic root of 221111130 is about 604.6956828477.

Adding to 221111130 its reverse (31111122), we get a palindrome (252222252).

The spelling of 221111130 in words is "two hundred twenty-one million, one hundred eleven thousand, one hundred thirty".