100221212020 has 24 divisors (see below), whose sum is σ = 212071150368. Its totient is φ = 39782464800.

The previous prime is 100221212017. The next prime is 100221212041. The reversal of 100221212020 is 20212122001.

It is a happy number.

It is a congruent number.

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, 19123566 + ... + 19128805.

It is an arithmetic number, because the mean of its divisors is an integer number (8836297932).

Almost surely, 2^100221212020 is an apocalyptic number.

100221212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221212020 is an abundant number, since it is smaller than the sum of its proper divisors (111849938348).

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

100221212020 is a wasteful number, since it uses less digits than its factorization.

100221212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38252511 (or 38252509 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100221212020 its reverse (20212122001), we get a palindrome (120433334021).

The spelling of 100221212020 in words is "one hundred billion, two hundred twenty-one million, two hundred twelve thousand, twenty".