21223132103 has 4 divisors (see below), whose sum is σ = 21421479240. Its totient is φ = 21024784968.

The previous prime is 21223132057. The next prime is 21223132109. The reversal of 21223132103 is 30123132212.

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 21223132103 - 2¹² = 21223128007 is a prime.

It is a super-2 number, since 2×21223132103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223132109) 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, 99173408 + ... + 99173621.

It is an arithmetic number, because the mean of its divisors is an integer number (5355369810).

Almost surely, 2^21223132103 is an apocalyptic number.

21223132103 is a deficient number, since it is larger than the sum of its proper divisors (198347137).

21223132103 is a wasteful number, since it uses less digits than its factorization.

21223132103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198347136.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21223132103 its reverse (30123132212), we get a palindrome (51346264315).

The spelling of 21223132103 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, one hundred three".