21060222 has 16 divisors (see below), whose sum is σ = 43479552. Its totient is φ = 6793560.

The previous prime is 21060211. The next prime is 21060257. The reversal of 21060222 is 22206012.

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, 56428 + ... + 56799.

It is an arithmetic number, because the mean of its divisors is an integer number (2717472).

Almost surely, 2^21060222 is an apocalyptic number.

21060222 is an abundant number, since it is smaller than the sum of its proper divisors (22419330).

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

21060222 is a wasteful number, since it uses less digits than its factorization.

21060222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113263.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21060222 is about 4589.1417498264. The cubic root of 21060222 is about 276.1558928170.

Adding to 21060222 its reverse (22206012), we get a palindrome (43266234).

The spelling of 21060222 in words is "twenty-one million, sixty thousand, two hundred twenty-two".