220100100 has 72 divisors (see below), whose sum is σ = 694726368. Its totient is φ = 53356800.

The previous prime is 220100099. The next prime is 220100117. The reversal of 220100100 is 1001022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30049 + ... + 36648.

Almost surely, 2^220100100 is an apocalyptic number.

220100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220100100 is an abundant number, since it is smaller than the sum of its proper divisors (474626268).

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

220100100 is a wasteful number, since it uses less digits than its factorization.

220100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66725 (or 66718 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 220100100 is about 14835.7709607556. The cubic root of 220100100 is about 603.7726180931.

Adding to 220100100 its reverse (1001022), we get a palindrome (221101122).

It can be divided in two parts, 2 and 20100100, that added together give a palindrome (20100102).

The spelling of 220100100 in words is "two hundred twenty million, one hundred thousand, one hundred".