100221012109 has 8 divisors (see below), whose sum is σ = 105590270240. Its totient is φ = 94861200816.

The previous prime is 100221012103. The next prime is 100221012127. The reversal of 100221012109 is 901210122001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100221012109 - 2⁷ = 100221011981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221012103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2339919 + ... + 2382364.

It is an arithmetic number, because the mean of its divisors is an integer number (13198783780).

Almost surely, 2^100221012109 is an apocalyptic number.

100221012109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

100221012109 is a deficient number, since it is larger than the sum of its proper divisors (5369258131).

100221012109 is a wasteful number, since it uses less digits than its factorization.

100221012109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723419.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 100221012109 in words is "one hundred billion, two hundred twenty-one million, twelve thousand, one hundred nine".