21341222 has 16 divisors (see below), whose sum is σ = 38737440. Its totient is φ = 8608128.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341222 is 22214312.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21341222.

It is a congruent number.

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, 44597 + ... + 45072.

It is an arithmetic number, because the mean of its divisors is an integer number (2421090).

Almost surely, 2^21341222 is an apocalyptic number.

21341222 is a deficient number, since it is larger than the sum of its proper divisors (17396218).

21341222 is a wasteful number, since it uses less digits than its factorization.

21341222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89695.

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

The square root of 21341222 is about 4619.6560478027. The cubic root of 21341222 is about 277.3786911272.

Adding to 21341222 its reverse (22214312), we get a palindrome (43555534).

The spelling of 21341222 in words is "twenty-one million, three hundred forty-one thousand, two hundred twenty-two".