21223103 has 8 divisors (see below), whose sum is σ = 23301840. Its totient is φ = 19169280.

The previous prime is 21223093. The next prime is 21223141. The reversal of 21223103 is 30132212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223103 - 2⁸ = 21222847 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4418 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (2912730).

Almost surely, 2^21223103 is an apocalyptic number.

21223103 is a deficient number, since it is larger than the sum of its proper divisors (2078737).

21223103 is a wasteful number, since it uses less digits than its factorization.

21223103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21223103 is about 4606.8539156348. The cubic root of 21223103 is about 276.8660006043.

Adding to 21223103 its reverse (30132212), we get a palindrome (51355315).

It can be divided in two parts, 2122 and 3103, that added together give a palindrome (5225).

The spelling of 21223103 in words is "twenty-one million, two hundred twenty-three thousand, one hundred three".