21321033103 has 8 divisors (see below), whose sum is σ = 22567191920. Its totient is φ = 20087274240.

The previous prime is 21321033101. The next prime is 21321033109. The reversal of 21321033103 is 30133012312.

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

It is not a de Polignac number, because 21321033103 - 2¹ = 21321033101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321033101) 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, 3096450 + ... + 3103327.

It is an arithmetic number, because the mean of its divisors is an integer number (2820898990).

Almost surely, 2^21321033103 is an apocalyptic number.

21321033103 is a deficient number, since it is larger than the sum of its proper divisors (1246158817).

21321033103 is a wasteful number, since it uses less digits than its factorization.

21321033103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199977.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21321033103 its reverse (30133012312), we get a palindrome (51454045415).

The spelling of 21321033103 in words is "twenty-one billion, three hundred twenty-one million, thirty-three thousand, one hundred three".