100220000020 has 72 divisors (see below), whose sum is σ = 244536993792. Its totient is φ = 33797669760.

The previous prime is 100220000009. The next prime is 100220000033. The reversal of 100220000020 is 20000022001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 100219999958 and 100220000012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424749 + ... + 617131.

It is an arithmetic number, because the mean of its divisors is an integer number (3396347136).

Almost surely, 2^100220000020 is an apocalyptic number.

100220000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100220000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122268496896).

100220000020 is an abundant number, since it is smaller than the sum of its proper divisors (144316993772).

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

100220000020 is a wasteful number, since it uses less digits than its factorization.

100220000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192521 (or 192458 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 100220000020 its reverse (20000022001), we get a palindrome (120220022021).

The spelling of 100220000020 in words is "one hundred billion, two hundred twenty million, twenty", and thus it is an aban number.