100022220 has 72 divisors (see below), whose sum is σ = 321257664. Its totient is φ = 25102848.

The previous prime is 100022201. The next prime is 100022227. The reversal of 100022220 is 22220001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100022227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13284 + ... + 19403.

It is an arithmetic number, because the mean of its divisors is an integer number (4461912).

Almost surely, 2^100022220 is an apocalyptic number.

100022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100022220 is an abundant number, since it is smaller than the sum of its proper divisors (221235444).

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

100022220 is a wasteful number, since it uses less digits than its factorization.

100022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32719 (or 32714 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 100022220 is about 10001.1109382908. The cubic root of 100022220 is about 464.1932595166.

Adding to 100022220 its reverse (22220001), we get a palindrome (122242221).

It can be divided in two parts, 1000 and 22220, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 100022220 in words is "one hundred million, twenty-two thousand, two hundred twenty".