100021320020003 has 4 divisors (see below), whose sum is σ = 100028375216520. Its totient is φ = 100014264823488.

The previous prime is 100021320019997. The next prime is 100021320020047. The reversal of 100021320020003 is 300020023120001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100021320020003 - 2¹⁸ = 100021319757859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100021320020003.

It is not an unprimeable number, because it can be changed into a prime (100021320320003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3527576993 + ... + 3527605346.

It is an arithmetic number, because the mean of its divisors is an integer number (25007093804130).

Almost surely, 2^{100021320020003} is an apocalyptic number.

100021320020003 is a deficient number, since it is larger than the sum of its proper divisors (7055196517).

100021320020003 is an equidigital number, since it uses as much as digits as its factorization.

100021320020003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055196516.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 100021320020003 its reverse (300020023120001), we get a palindrome (400041343140004).

The spelling of 100021320020003 in words is "one hundred trillion, twenty-one billion, three hundred twenty million, twenty thousand, three".