21331386103 has 4 divisors (see below), whose sum is σ = 21692935080. Its totient is φ = 20969837128.

The previous prime is 21331386101. The next prime is 21331386107. The reversal of 21331386103 is 30168313312.

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 21331386103 - 2¹ = 21331386101 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 (21331386101) 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, 180774400 + ... + 180774517.

It is an arithmetic number, because the mean of its divisors is an integer number (5423233770).

Almost surely, 2^21331386103 is an apocalyptic number.

21331386103 is a deficient number, since it is larger than the sum of its proper divisors (361548977).

21331386103 is an equidigital number, since it uses as much as digits as its factorization.

21331386103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361548976.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 21331386103 its reverse (30168313312), we get a palindrome (51499699415).

The spelling of 21331386103 in words is "twenty-one billion, three hundred thirty-one million, three hundred eighty-six thousand, one hundred three".