21133122 has 32 divisors (see below), whose sum is σ = 43593984. Its totient is φ = 6825600.

The previous prime is 21133121. The next prime is 21133153. The reversal of 21133122 is 22133112.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21133121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 66508 + ... + 66824.

It is an arithmetic number, because the mean of its divisors is an integer number (1362312).

Almost surely, 2^21133122 is an apocalyptic number.

21133122 is an abundant number, since it is smaller than the sum of its proper divisors (22460862).

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

21133122 is a wasteful number, since it uses less digits than its factorization.

21133122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its digits is 72, while the sum is 15.

The square root of 21133122 is about 4597.0775499223. The cubic root of 21133122 is about 276.4741639229.

Adding to 21133122 its reverse (22133112), we get a palindrome (43266234).

It can be divided in two parts, 211 and 33122, that added together give a palindrome (33333).

The spelling of 21133122 in words is "twenty-one million, one hundred thirty-three thousand, one hundred twenty-two".