21200003123243 has 8 divisors (see below), whose sum is σ = 24229090229760. Its totient is φ = 18171044824680.

The previous prime is 21200003123231. The next prime is 21200003123249. The reversal of 21200003123243 is 34232130000212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21200003123243 - 2¹⁰ = 21200003122219 is a prime.

It is a super-3 number, since 3×21200003123243³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200003123249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31849043 + ... + 32507868.

It is an arithmetic number, because the mean of its divisors is an integer number (3028636278720).

Almost surely, 2^{21200003123243} is an apocalyptic number.

21200003123243 is a deficient number, since it is larger than the sum of its proper divisors (3029087106517).

21200003123243 is an equidigital number, since it uses as much as digits as its factorization.

21200003123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64403977.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21200003123243 its reverse (34232130000212), we get a palindrome (55432133123455).

The spelling of 21200003123243 in words is "twenty-one trillion, two hundred billion, three million, one hundred twenty-three thousand, two hundred forty-three".