22022001211221 has 24 divisors (see below), whose sum is σ = 34734734186880. Its totient is φ = 13333821652800.

The previous prime is 22022001211207. The next prime is 22022001211229. The reversal of 22022001211221 is 12211210022022.

It is a happy number.

22022001211221 is a `hidden beast` number, since 220 + 2 + 200 + 1 + 21 + 1 + 221 = 666.

It is not a de Polignac number, because 22022001211221 - 2³⁷ = 21884562257749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22022001211194 and 22022001211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022001211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106944520 + ... + 107150241.

It is an arithmetic number, because the mean of its divisors is an integer number (1447280591120).

Almost surely, 2^{22022001211221} is an apocalyptic number.

It is an amenable number.

22022001211221 is a deficient number, since it is larger than the sum of its proper divisors (12712732975659).

22022001211221 is a wasteful number, since it uses less digits than its factorization.

22022001211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214095817 (or 214095814 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22022001211221 its reverse (12211210022022), we get a palindrome (34233211233243).

It can be divided in two parts, 22022001 and 211221, that added together give a palindrome (22233222).

The spelling of 22022001211221 in words is "twenty-two trillion, twenty-two billion, one million, two hundred eleven thousand, two hundred twenty-one".