21003311200123 has 8 divisors (see below), whose sum is σ = 24075012077792. Its totient is φ = 17949417284736.

The previous prime is 21003311200099. The next prime is 21003311200129. The reversal of 21003311200123 is 32100211330012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21003311200123 is a prime.

It is a super-2 number, since 2×21003311200123² (a number of 27 digits) contains 22 as substring.

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 21003311200123.

It is not an unprimeable number, because it can be changed into a prime (21003311200129) 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, 4451738040 + ... + 4451742757.

It is an arithmetic number, because the mean of its divisors is an integer number (3009376509724).

Almost surely, 2^{21003311200123} is an apocalyptic number.

21003311200123 is a deficient number, since it is larger than the sum of its proper divisors (3071700877669).

21003311200123 is an equidigital number, since it uses as much as digits as its factorization.

21003311200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8903481141.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21003311200123 its reverse (32100211330012), we get a palindrome (53103522530135).

The spelling of 21003311200123 in words is "twenty-one trillion, three billion, three hundred eleven million, two hundred thousand, one hundred twenty-three".