221102124 has 12 divisors (see below), whose sum is σ = 515904984. Its totient is φ = 73700704.

The previous prime is 221102117. The next prime is 221102191. The reversal of 221102124 is 421201122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×221102124² = 97772298474622752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212577 + ... + 9212600.

It is an arithmetic number, because the mean of its divisors is an integer number (42992082).

Almost surely, 2^221102124 is an apocalyptic number.

It is an amenable number.

221102124 is an abundant number, since it is smaller than the sum of its proper divisors (294802860).

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

221102124 is a wasteful number, since it uses less digits than its factorization.

221102124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18425184 (or 18425182 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221102124 is about 14869.5031524258. The cubic root of 221102124 is about 604.6874728535.

Adding to 221102124 its reverse (421201122), we get a palindrome (642303246).

The spelling of 221102124 in words is "two hundred twenty-one million, one hundred two thousand, one hundred twenty-four".