21003223013 has 8 divisors (see below), whose sum is σ = 21683083776. Its totient is φ = 20323508400.

The previous prime is 21003222973. The next prime is 21003223051. The reversal of 21003223013 is 31032230012.

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 21003223013 - 2²² = 20999028709 is a prime.

It is a super-2 number, since 2×21003223013² (a number of 21 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 = 21003222982 and 21003223000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003253013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306923 + ... + 369063.

It is an arithmetic number, because the mean of its divisors is an integer number (2710385472).

Almost surely, 2^21003223013 is an apocalyptic number.

It is an amenable number.

21003223013 is a deficient number, since it is larger than the sum of its proper divisors (679860763).

21003223013 is a wasteful number, since it uses less digits than its factorization.

21003223013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73075.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21003223013 its reverse (31032230012), we get a palindrome (52035453025).

The spelling of 21003223013 in words is "twenty-one billion, three million, two hundred twenty-three thousand, thirteen".