21330122 has 24 divisors (see below), whose sum is σ = 37027200. Its totient is φ = 9183240.

The previous prime is 21330119. The next prime is 21330149. The reversal of 21330122 is 22103312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21330097 and 21330106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2279 + ... + 6917.

It is an arithmetic number, because the mean of its divisors is an integer number (1542800).

Almost surely, 2^21330122 is an apocalyptic number.

21330122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21330122 is a deficient number, since it is larger than the sum of its proper divisors (15697078).

21330122 is a wasteful number, since it uses less digits than its factorization.

21330122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682 (or 4671 counting only the distinct ones).

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

The square root of 21330122 is about 4618.4545034026. The cubic root of 21330122 is about 277.3305927033.

Adding to 21330122 its reverse (22103312), we get a palindrome (43433434).

The spelling of 21330122 in words is "twenty-one million, three hundred thirty thousand, one hundred twenty-two".