21242043003 has 16 divisors (see below), whose sum is σ = 28567641600. Its totient is φ = 14039269344.

The previous prime is 21242042971. The next prime is 21242043013. The reversal of 21242043003 is 30034024212.

It is not a de Polignac number, because 21242043003 - 2⁵ = 21242042971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21242043013) 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, 188350 + ... + 279212.

It is an arithmetic number, because the mean of its divisors is an integer number (1785477600).

Almost surely, 2^21242043003 is an apocalyptic number.

21242043003 is a deficient number, since it is larger than the sum of its proper divisors (7325598597).

21242043003 is a wasteful number, since it uses less digits than its factorization.

21242043003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91538.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21242043003 its reverse (30034024212), we get a palindrome (51276067215).

The spelling of 21242043003 in words is "twenty-one billion, two hundred forty-two million, forty-three thousand, three".