21200113001 has 4 divisors (see below), whose sum is σ = 21278924100. Its totient is φ = 21121301904.

The previous prime is 21200112937. The next prime is 21200113021. The reversal of 21200113001 is 10031100212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5825352976 + 15374760025 = 76324^2 + 123995^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200113001 - 2⁶ = 21200112937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200113021) 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, 39405146 + ... + 39405683.

It is an arithmetic number, because the mean of its divisors is an integer number (5319731025).

Almost surely, 2^21200113001 is an apocalyptic number.

It is an amenable number.

21200113001 is a deficient number, since it is larger than the sum of its proper divisors (78811099).

21200113001 is an equidigital number, since it uses as much as digits as its factorization.

21200113001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78811098.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21200113001 its reverse (10031100212), we get a palindrome (31231213213).

The spelling of 21200113001 in words is "twenty-one billion, two hundred million, one hundred thirteen thousand, one".