21203222103 has 48 divisors (see below), whose sum is σ = 37199373120. Its totient is φ = 11360867328.

The previous prime is 21203222099. The next prime is 21203222111. The reversal of 21203222103 is 30122230212.

It is not a de Polignac number, because 21203222103 - 2² = 21203222099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203222113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251301 + ... + 324897.

It is an arithmetic number, because the mean of its divisors is an integer number (774986940).

Almost surely, 2^21203222103 is an apocalyptic number.

21203222103 is a deficient number, since it is larger than the sum of its proper divisors (15996151017).

21203222103 is a wasteful number, since it uses less digits than its factorization.

21203222103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73896 (or 73893 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21203222103 its reverse (30122230212), we get a palindrome (51325452315).

It can be divided in two parts, 2120 and 3222103, that added together give a palindrome (3224223).

The spelling of 21203222103 in words is "twenty-one billion, two hundred three million, two hundred twenty-two thousand, one hundred three".