21122234 has 24 divisors (see below), whose sum is σ = 38462688. Its totient is φ = 8657880.

The previous prime is 21122221. The next prime is 21122251. The reversal of 21122234 is 43222112.

It is a super-2 number, since 2×21122234² = 892297538301512, which contains 22 as substring.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 2432 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (1602612).

Almost surely, 2^21122234 is an apocalyptic number.

21122234 is a deficient number, since it is larger than the sum of its proper divisors (17340454).

21122234 is a wasteful number, since it uses less digits than its factorization.

21122234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9410 (or 9403 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 21122234 is about 4595.8931667305. The cubic root of 21122234 is about 276.4266749967.

Adding to 21122234 its reverse (43222112), we get a palindrome (64344346).

The spelling of 21122234 in words is "twenty-one million, one hundred twenty-two thousand, two hundred thirty-four".