21200430232243 has 4 divisors (see below), whose sum is σ = 21200446580688. Its totient is φ = 21200413883800.

The previous prime is 21200430232211. The next prime is 21200430232277. The reversal of 21200430232243 is 34223203400212.

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 21200430232243 - 2⁵ = 21200430232211 is a prime.

It is a super-2 number, since 2×21200430232243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200430232283) 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, 6043996 + ... + 8884297.

It is an arithmetic number, because the mean of its divisors is an integer number (5300111645172).

Almost surely, 2^{21200430232243} is an apocalyptic number.

21200430232243 is a deficient number, since it is larger than the sum of its proper divisors (16348445).

21200430232243 is a wasteful number, since it uses less digits than its factorization.

21200430232243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16348444.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21200430232243 its reverse (34223203400212), we get a palindrome (55423633632455).

The spelling of 21200430232243 in words is "twenty-one trillion, two hundred billion, four hundred thirty million, two hundred thirty-two thousand, two hundred forty-three".