21310203003 has 8 divisors (see below), whose sum is σ = 28414424400. Its totient is φ = 14206391808.

The previous prime is 21310202909. The next prime is 21310203049. The reversal of 21310203003 is 30030201312.

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

It is not a de Polignac number, because 21310203003 - 2⁸ = 21310202747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21310203703) 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, 51903 + ... + 212871.

It is an arithmetic number, because the mean of its divisors is an integer number (3551803050).

Almost surely, 2^21310203003 is an apocalyptic number.

21310203003 is a deficient number, since it is larger than the sum of its proper divisors (7104221397).

21310203003 is a wasteful number, since it uses less digits than its factorization.

21310203003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205101.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21310203003 its reverse (30030201312), we get a palindrome (51340404315).

The spelling of 21310203003 in words is "twenty-one billion, three hundred ten million, two hundred three thousand, three".