21220233103 has 4 divisors (see below), whose sum is σ = 21249747360. Its totient is φ = 21190718848.

The previous prime is 21220233091. The next prime is 21220233137. The reversal of 21220233103 is 30133202212.

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 21220233103 - 2²⁵ = 21186678671 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 (21220234103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14756050 + ... + 14757487.

It is an arithmetic number, because the mean of its divisors is an integer number (5312436840).

Almost surely, 2^21220233103 is an apocalyptic number.

21220233103 is a deficient number, since it is larger than the sum of its proper divisors (29514257).

21220233103 is an equidigital number, since it uses as much as digits as its factorization.

21220233103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29514256.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21220233103 its reverse (30133202212), we get a palindrome (51353435315).

The spelling of 21220233103 in words is "twenty-one billion, two hundred twenty million, two hundred thirty-three thousand, one hundred three".