21123322 has 8 divisors (see below), whose sum is σ = 34565472. Its totient is φ = 9601500.

The previous prime is 21123313. The next prime is 21123331. The reversal of 21123322 is 22332112.

It is an interprime number because it is at equal distance from previous prime (21123313) and next prime (21123331).

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

It is a junction number, because it is equal to n+sod(n) for n = 21123296 and 21123305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480054 + ... + 480097.

It is an arithmetic number, because the mean of its divisors is an integer number (4320684).

Almost surely, 2^21123322 is an apocalyptic number.

21123322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21123322 is a deficient number, since it is larger than the sum of its proper divisors (13442150).

21123322 is a wasteful number, since it uses less digits than its factorization.

21123322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960164.

The product of its digits is 144, while the sum is 16.

The square root of 21123322 is about 4596.0115317523. The cubic root of 21123322 is about 276.4314211338.

Adding to 21123322 its reverse (22332112), we get a palindrome (43455434).

The spelling of 21123322 in words is "twenty-one million, one hundred twenty-three thousand, three hundred twenty-two".