21330021021103 has 4 divisors (see below), whose sum is σ = 21343343959008. Its totient is φ = 21316698083200.

The previous prime is 21330021021083. The next prime is 21330021021119. The reversal of 21330021021103 is 30112012003312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21330021021103 - 2⁹ = 21330021020591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330021051103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6661466551 + ... + 6661469752.

It is an arithmetic number, because the mean of its divisors is an integer number (5335835989752).

Almost surely, 2^{21330021021103} is an apocalyptic number.

21330021021103 is a deficient number, since it is larger than the sum of its proper divisors (13322937905).

21330021021103 is a wasteful number, since it uses less digits than its factorization.

21330021021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322937904.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21330021021103 its reverse (30112012003312), we get a palindrome (51442033024415).

The spelling of 21330021021103 in words is "twenty-one trillion, three hundred thirty billion, twenty-one million, twenty-one thousand, one hundred three".