21001403223003 has 16 divisors (see below), whose sum is σ = 33686461310720. Its totient is φ = 11369180691936.

The previous prime is 21001403223001. The next prime is 21001403223019. The reversal of 21001403223003 is 30032230410012.

It is not a de Polignac number, because 21001403223003 - 2¹ = 21001403223001 is a prime.

It is a super-2 number, since 2×21001403223003² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001403223001) 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, 26317547500 + ... + 26317548297.

It is an arithmetic number, because the mean of its divisors is an integer number (2105403831920).

Almost surely, 2^{21001403223003} is an apocalyptic number.

21001403223003 is a deficient number, since it is larger than the sum of its proper divisors (12685058087717).

21001403223003 is a wasteful number, since it uses less digits than its factorization.

21001403223003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52635095826.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21001403223003 its reverse (30032230410012), we get a palindrome (51033633633015).

The spelling of 21001403223003 in words is "twenty-one trillion, one billion, four hundred three million, two hundred twenty-three thousand, three".