100221111020 has 24 divisors (see below), whose sum is σ = 217721725200. Its totient is φ = 38706084032.

The previous prime is 100221110987. The next prime is 100221111043. The reversal of 100221111020 is 20111122001.

It is a junction number, because it is equal to n+sod(n) for n = 100221110992 and 100221111010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86396930 + ... + 86398089.

It is an arithmetic number, because the mean of its divisors is an integer number (9071738550).

Almost surely, 2^100221111020 is an apocalyptic number.

100221111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221111020 is an abundant number, since it is smaller than the sum of its proper divisors (117500614180).

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

100221111020 is a wasteful number, since it uses less digits than its factorization.

100221111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172795057 (or 172795055 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100221111020 its reverse (20111122001), we get a palindrome (120332233021).

The spelling of 100221111020 in words is "one hundred billion, two hundred twenty-one million, one hundred eleven thousand, twenty".