21122330 has 16 divisors (see below), whose sum is σ = 40257000. Its totient is φ = 7951872.

The previous prime is 21122323. The next prime is 21122351. The reversal of 21122330 is 3322112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20367169 + 755161 = 4513^2 + 869^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61955 + ... + 62294.

Almost surely, 2^21122330 is an apocalyptic number.

21122330 is a deficient number, since it is larger than the sum of its proper divisors (19134670).

21122330 is a wasteful number, since it uses less digits than its factorization.

21122330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124273.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21122330 is about 4595.9036108256. The cubic root of 21122330 is about 276.4270937800.

Adding to 21122330 its reverse (3322112), we get a palindrome (24444442).

The spelling of 21122330 in words is "twenty-one million, one hundred twenty-two thousand, three hundred thirty".