21223022 has 8 divisors (see below), whose sum is σ = 32132376. Its totient is φ = 10512232.

The previous prime is 21223009. The next prime is 21223051. The reversal of 21223022 is 22032212.

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 = 21222988 and 21223006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49373 + ... + 49800.

It is an arithmetic number, because the mean of its divisors is an integer number (4016547).

Almost surely, 2^21223022 is an apocalyptic number.

21223022 is a deficient number, since it is larger than the sum of its proper divisors (10909354).

21223022 is a wasteful number, since it uses less digits than its factorization.

21223022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99282.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21223022 is about 4606.8451243774. The cubic root of 21223022 is about 276.8656483754.

Adding to 21223022 its reverse (22032212), we get a palindrome (43255234).

The spelling of 21223022 in words is "twenty-one million, two hundred twenty-three thousand, twenty-two".