22021001222 has 16 divisors (see below), whose sum is σ = 36054111744. Its totient is φ = 10004061000.

The previous prime is 22021001213. The next prime is 22021001239. The reversal of 22021001222 is 22210012022.

It is a junction number, because it is equal to n+sod(n) for n = 22021001197 and 22021001206.

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, 233054 + ... + 313617.

It is an arithmetic number, because the mean of its divisors is an integer number (2253381984).

Almost surely, 2^22021001222 is an apocalyptic number.

22021001222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22021001222 is a deficient number, since it is larger than the sum of its proper divisors (14033110522).

22021001222 is a wasteful number, since it uses less digits than its factorization.

22021001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548515.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22021001222 its reverse (22210012022), we get a palindrome (44231013244).

The spelling of 22021001222 in words is "twenty-two billion, twenty-one million, one thousand, two hundred twenty-two".