21333122 has 8 divisors (see below), whose sum is σ = 32359500. Its totient is φ = 10546624.

The previous prime is 21333107. The next prime is 21333133. The reversal of 21333122 is 22133312.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 1343281 = 4471^2 + 1159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21333122.

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, 59747 + ... + 60102.

Almost surely, 2^21333122 is an apocalyptic number.

21333122 is a deficient number, since it is larger than the sum of its proper divisors (11026378).

21333122 is a wasteful number, since it uses less digits than its factorization.

21333122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119940.

The product of its digits is 216, while the sum is 17.

The square root of 21333122 is about 4618.7792759559. The cubic root of 21333122 is about 277.3435939225.

Adding to 21333122 its reverse (22133312), we get a palindrome (43466434).

It can be divided in two parts, 2133312 and 2, that multiplied together give a palindrome (4266624).

The spelling of 21333122 in words is "twenty-one million, three hundred thirty-three thousand, one hundred twenty-two".