100021221079 has 8 divisors (see below), whose sum is σ = 107983783152. Its totient is φ = 92097033600.

The previous prime is 100021221077. The next prime is 100021221119. The reversal of 100021221079 is 970122120001.

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

It is not a de Polignac number, because 100021221079 - 2¹ = 100021221077 is a prime.

It is a super-3 number, since 3×100021221079³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021221071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9588229 + ... + 9598654.

It is an arithmetic number, because the mean of its divisors is an integer number (13497972894).

Almost surely, 2^100021221079 is an apocalyptic number.

100021221079 is a deficient number, since it is larger than the sum of its proper divisors (7962562073).

100021221079 is a wasteful number, since it uses less digits than its factorization.

100021221079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19187297.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 100021221079 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, seventy-nine".