220012100 has 72 divisors (see below), whose sum is σ = 595253568. Its totient is φ = 68572800.

The previous prime is 220012097. The next prime is 220012103. The reversal of 220012100 is 1210022.

It is an interprime number because it is at equal distance from previous prime (220012097) and next prime (220012103).

It is not an unprimeable number, because it can be changed into a prime (220012103) by changing a digit.

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, 6587 + ... + 21986.

Almost surely, 2^220012100 is an apocalyptic number.

220012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220012100 is an abundant number, since it is smaller than the sum of its proper divisors (375241468).

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

220012100 is a wasteful number, since it uses less digits than its factorization.

220012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28605 (or 28598 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 220012100 is about 14832.8048594998. The cubic root of 220012100 is about 603.6921409632.

Adding to 220012100 its reverse (1210022), we get a palindrome (221222122).

The spelling of 220012100 in words is "two hundred twenty million, twelve thousand, one hundred".