100444050021 has 16 divisors (see below), whose sum is σ = 153622396928. Its totient is φ = 57184801200.

The previous prime is 100444050019. The next prime is 100444050029. The reversal of 100444050021 is 120050444001.

It is a happy number.

It is not a de Polignac number, because 100444050021 - 2¹ = 100444050019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 100444050021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100444050029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8819125 + ... + 8830506.

It is an arithmetic number, because the mean of its divisors is an integer number (9601399808).

Almost surely, 2^100444050021 is an apocalyptic number.

It is an amenable number.

100444050021 is a deficient number, since it is larger than the sum of its proper divisors (53178346907).

100444050021 is a wasteful number, since it uses less digits than its factorization.

100444050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17649912.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 100444050021 its reverse (120050444001), we get a palindrome (220494494022).

The spelling of 100444050021 in words is "one hundred billion, four hundred forty-four million, fifty thousand, twenty-one".