100433331021 has 4 divisors (see below), whose sum is σ = 133911108032. Its totient is φ = 66955554012.

The previous prime is 100433331013. The next prime is 100433331059. The reversal of 100433331021 is 120133334001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100433331021 - 2³ = 100433331013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100433336021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16738888501 + ... + 16738888506.

It is an arithmetic number, because the mean of its divisors is an integer number (33477777008).

Almost surely, 2^100433331021 is an apocalyptic number.

It is an amenable number.

100433331021 is a deficient number, since it is larger than the sum of its proper divisors (33477777011).

100433331021 is an equidigital number, since it uses as much as digits as its factorization.

100433331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33477777010.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 100433331021 its reverse (120133334001), we get a palindrome (220566665022).

The spelling of 100433331021 in words is "one hundred billion, four hundred thirty-three million, three hundred thirty-one thousand, twenty-one".