21222012022 has 32 divisors (see below), whose sum is σ = 33359040000. Its totient is φ = 10112570496.

The previous prime is 21222011969. The next prime is 21222012047. The reversal of 21222012022 is 22021022212.

It is a junction number, because it is equal to n+sod(n) for n = 21222011987 and 21222012005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1694379 + ... + 1706857.

It is an arithmetic number, because the mean of its divisors is an integer number (1042470000).

Almost surely, 2^21222012022 is an apocalyptic number.

21222012022 is a deficient number, since it is larger than the sum of its proper divisors (12137027978).

21222012022 is a wasteful number, since it uses less digits than its factorization.

21222012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12888.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21222012022 its reverse (22021022212), we get a palindrome (43243034234).

The spelling of 21222012022 in words is "twenty-one billion, two hundred twenty-two million, twelve thousand, twenty-two".