21003131233223 has 8 divisors (see below), whose sum is σ = 21174713736096. Its totient is φ = 20832125479200.

The previous prime is 21003131233177. The next prime is 21003131233267. The reversal of 21003131233223 is 32233213130012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21003131233223 is a prime.

It is a super-2 number, since 2×21003131233223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21003131233192 and 21003131233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003131233283) 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, 144114083 + ... + 144259748.

It is an arithmetic number, because the mean of its divisors is an integer number (2646839217012).

Almost surely, 2^{21003131233223} is an apocalyptic number.

21003131233223 is a deficient number, since it is larger than the sum of its proper divisors (171582502873).

21003131233223 is a wasteful number, since it uses less digits than its factorization.

21003131233223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288374425.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21003131233223 its reverse (32233213130012), we get a palindrome (53236344363235).

The spelling of 21003131233223 in words is "twenty-one trillion, three billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred twenty-three".