21222102 has 16 divisors (see below), whose sum is σ = 46302912. Its totient is φ = 6430920.

The previous prime is 21222043. The next prime is 21222143. The reversal of 21222102 is 20122212.

It is a super-2 number, since 2×21222102² = 900755226596808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160708 + ... + 160839.

It is an arithmetic number, because the mean of its divisors is an integer number (2893932).

Almost surely, 2^21222102 is an apocalyptic number.

21222102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222102 is an abundant number, since it is smaller than the sum of its proper divisors (25080810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222102 is a wasteful number, since it uses less digits than its factorization.

21222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321563.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21222102 is about 4606.7452718812. The cubic root of 21222102 is about 276.8616476872.

Adding to 21222102 its reverse (20122212), we get a palindrome (41344314).

It can be divided in two parts, 2122210 and 2, that added together give a palindrome (2122212).

The spelling of 21222102 in words is "twenty-one million, two hundred twenty-two thousand, one hundred two".