21233122 has 4 divisors (see below), whose sum is σ = 31849686. Its totient is φ = 10616560.

The previous prime is 21233111. The next prime is 21233123. The reversal of 21233122 is 22133212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 8637721 = 3549^2 + 2939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21233096 and 21233105.

It is not an unprimeable number, because it can be changed into a prime (21233123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308279 + ... + 5308282.

Almost surely, 2^21233122 is an apocalyptic number.

21233122 is a deficient number, since it is larger than the sum of its proper divisors (10616564).

21233122 is a wasteful number, since it uses less digits than its factorization.

21233122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616563.

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

The square root of 21233122 is about 4607.9411888608. The cubic root of 21233122 is about 276.9095613734.

Adding to 21233122 its reverse (22133212), we get a palindrome (43366334).

The spelling of 21233122 in words is "twenty-one million, two hundred thirty-three thousand, one hundred twenty-two".