21122334 has 12 divisors (see below), whose sum is σ = 45765096. Its totient is φ = 7040772.

The previous prime is 21122323. The next prime is 21122351. The reversal of 21122334 is 43322112.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173463 = 21122334 / (2 + 1 + 1 + 2 + 2 + 3 + 3 + 4).

It is a Curzon number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 586714 + ... + 586749.

It is an arithmetic number, because the mean of its divisors is an integer number (3813758).

Almost surely, 2^21122334 is an apocalyptic number.

21122334 is an abundant number, since it is smaller than the sum of its proper divisors (24642762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122334 is a wasteful number, since it uses less digits than its factorization.

21122334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173471 (or 1173468 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 21122334 is about 4595.9040459957. The cubic root of 21122334 is about 276.4271112293.

Adding to 21122334 its reverse (43322112), we get a palindrome (64444446).

The spelling of 21122334 in words is "twenty-one million, one hundred twenty-two thousand, three hundred thirty-four".