21240102003 has 8 divisors (see below), whose sum is σ = 28425416400. Its totient is φ = 14107427808.

The previous prime is 21240102001. The next prime is 21240102043. The reversal of 21240102003 is 30020104212.

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

It is not a de Polignac number, because 21240102003 - 2¹ = 21240102001 is a prime.

It is a super-2 number, since 2×21240102003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21240102001) 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, 13159108 + ... + 13160721.

It is an arithmetic number, because the mean of its divisors is an integer number (3553177050).

Almost surely, 2^21240102003 is an apocalyptic number.

21240102003 is a deficient number, since it is larger than the sum of its proper divisors (7185314397).

21240102003 is a wasteful number, since it uses less digits than its factorization.

21240102003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26320101.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21240102003 its reverse (30020104212), we get a palindrome (51260206215).

The spelling of 21240102003 in words is "twenty-one billion, two hundred forty million, one hundred two thousand, three".