220100021100 has 108 divisors (see below), whose sum is σ = 713680727760. Its totient is φ = 56669424000.

The previous prime is 220100021083. The next prime is 220100021137. The reversal of 220100021100 is 1120001022.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4190376 + ... + 4242575.

Almost surely, 2^220100021100 is an apocalyptic number.

220100021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220100021100 is an abundant number, since it is smaller than the sum of its proper divisors (493580706660).

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

220100021100 is a wasteful number, since it uses less digits than its factorization.

220100021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8433000 (or 8432990 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 220100021100 its reverse (1120001022), we get a palindrome (221220022122).

The spelling of 220100021100 in words is "two hundred twenty billion, one hundred million, twenty-one thousand, one hundred".