100921192021 has 8 divisors (see below), whose sum is σ = 108700431840. Its totient is φ = 93144248112.

The previous prime is 100921192003. The next prime is 100921192037. The reversal of 100921192021 is 120291129001.

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 100921192021 - 2²¹ = 100919094869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100921192051) 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, 482131 + ... + 659008.

It is an arithmetic number, because the mean of its divisors is an integer number (13587553980).

Almost surely, 2^100921192021 is an apocalyptic number.

It is an amenable number.

100921192021 is a deficient number, since it is larger than the sum of its proper divisors (7779239819).

100921192021 is a wasteful number, since it uses less digits than its factorization.

100921192021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147955.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 100921192021 in words is "one hundred billion, nine hundred twenty-one million, one hundred ninety-two thousand, twenty-one".