21013311003 has 16 divisors (see below), whose sum is σ = 29601216000. Its totient is φ = 13222582560.

The previous prime is 21013311001. The next prime is 21013311029. The reversal of 21013311003 is 30011331012.

It is not a de Polignac number, because 21013311003 - 2¹ = 21013311001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013311001) 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, 664728 + ... + 695621.

It is an arithmetic number, because the mean of its divisors is an integer number (1850076000).

Almost surely, 2^21013311003 is an apocalyptic number.

21013311003 is a deficient number, since it is larger than the sum of its proper divisors (8587904997).

21013311003 is a wasteful number, since it uses less digits than its factorization.

21013311003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360642.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21013311003 its reverse (30011331012), we get a palindrome (51024642015).

The spelling of 21013311003 in words is "twenty-one billion, thirteen million, three hundred eleven thousand, three".