21120200213 has 4 divisors (see below), whose sum is σ = 24137371680. Its totient is φ = 18103028748.

The previous prime is 21120200207. The next prime is 21120200249. The reversal of 21120200213 is 31200202112.

It is a happy number.

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 21120200213 - 2⁴ = 21120200197 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 (21120200113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508585723 + ... + 1508585736.

It is an arithmetic number, because the mean of its divisors is an integer number (6034342920).

Almost surely, 2^21120200213 is an apocalyptic number.

It is an amenable number.

21120200213 is a deficient number, since it is larger than the sum of its proper divisors (3017171467).

21120200213 is an equidigital number, since it uses as much as digits as its factorization.

21120200213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017171466.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21120200213 its reverse (31200202112), we get a palindrome (52320402325).

The spelling of 21120200213 in words is "twenty-one billion, one hundred twenty million, two hundred thousand, two hundred thirteen".