102221118 has 24 divisors (see below), whose sum is σ = 226882656. Its totient is φ = 33242400.

The previous prime is 102221117. The next prime is 102221129. The reversal of 102221118 is 811122201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102221118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68518 + ... + 69993.

It is an arithmetic number, because the mean of its divisors is an integer number (9453444).

Almost surely, 2^102221118 is an apocalyptic number.

102221118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

102221118 is an abundant number, since it is smaller than the sum of its proper divisors (124661538).

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

102221118 is a wasteful number, since it uses less digits than its factorization.

102221118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138560 (or 138557 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 102221118 is about 10110.4459842284. The cubic root of 102221118 is about 467.5702552961.

Adding to 102221118 its reverse (811122201), we get a palindrome (913343319).

The spelling of 102221118 in words is "one hundred two million, two hundred twenty-one thousand, one hundred eighteen".