21320022103 has 4 divisors (see below), whose sum is σ = 21337455888. Its totient is φ = 21302588320.

The previous prime is 21320022091. The next prime is 21320022107. The reversal of 21320022103 is 30122002312.

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 21320022103 - 2²¹ = 21317924951 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 (21320022107) 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, 8715058 + ... + 8717503.

It is an arithmetic number, because the mean of its divisors is an integer number (5334363972).

Almost surely, 2^21320022103 is an apocalyptic number.

21320022103 is a deficient number, since it is larger than the sum of its proper divisors (17433785).

21320022103 is a wasteful number, since it uses less digits than its factorization.

21320022103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17433784.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21320022103 its reverse (30122002312), we get a palindrome (51442024415).

The spelling of 21320022103 in words is "twenty-one billion, three hundred twenty million, twenty-two thousand, one hundred three".