21003104400223 has 16 divisors (see below), whose sum is σ = 22924294192800. Its totient is φ = 19083886663680.

The previous prime is 21003104400197. The next prime is 21003104400227. The reversal of 21003104400223 is 32200440130012.

It is a cyclic number.

It is not a de Polignac number, because 21003104400223 - 2²⁵ = 21003070845791 is a prime.

It is a super-2 number, since 2×21003104400223² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003104400194 and 21003104400203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003104400227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171122865 + ... + 171245557.

It is an arithmetic number, because the mean of its divisors is an integer number (1432768387050).

Almost surely, 2^{21003104400223} is an apocalyptic number.

21003104400223 is a deficient number, since it is larger than the sum of its proper divisors (1921189792577).

21003104400223 is a wasteful number, since it uses less digits than its factorization.

21003104400223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130602.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21003104400223 its reverse (32200440130012), we get a palindrome (53203544530235).

The spelling of 21003104400223 in words is "twenty-one trillion, three billion, one hundred four million, four hundred thousand, two hundred twenty-three".