100221000012 has 72 divisors (see below), whose sum is σ = 297352424096. Its totient is φ = 27860661504.

The previous prime is 100221000001. The next prime is 100221000013. The reversal of 100221000012 is 210000122001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100220999958 and 100221000003.

It is not an unprimeable number, because it can be changed into a prime (100221000013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5365033 + ... + 5383680.

Almost surely, 2^100221000012 is an apocalyptic number.

100221000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100221000012 is an abundant number, since it is smaller than the sum of its proper divisors (197131424084).

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

100221000012 is a wasteful number, since it uses less digits than its factorization.

100221000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10748767 (or 10748762 counting only the distinct ones).

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

Adding to 100221000012 its reverse (210000122001), we get a palindrome (310221122013).

The spelling of 100221000012 in words is "one hundred billion, two hundred twenty-one million, twelve", and thus it is an aban number.