221102130 has 64 divisors (see below), whose sum is σ = 548684928. Its totient is φ = 56985600.

The previous prime is 221102117. The next prime is 221102191. The reversal of 221102130 is 31201122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129442 + ... + 131138.

It is an arithmetic number, because the mean of its divisors is an integer number (8573202).

Almost surely, 2^221102130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274342464).

221102130 is an abundant number, since it is smaller than the sum of its proper divisors (327582798).

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

221102130 is a wasteful number, since it uses less digits than its factorization.

221102130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221102130 is about 14869.5033541810. The cubic root of 221102130 is about 604.6874783233.

Adding to 221102130 its reverse (31201122), we get a palindrome (252303252).

The spelling of 221102130 in words is "two hundred twenty-one million, one hundred two thousand, one hundred thirty".