22011210022221 has 128 divisors (see below), whose sum is σ = 38193797345280. Its totient is φ = 12269114323200.

The previous prime is 22011210022157. The next prime is 22011210022303. The reversal of 22011210022221 is 12222001211022.

It is a happy number.

22011210022221 is a `hidden beast` number, since 220 + 11 + 210 + 0 + 2 + 2 + 221 = 666.

It is not a de Polignac number, because 22011210022221 - 2⁶ = 22011210022157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011210022194 and 22011210022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011210022421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 688415191 + ... + 688447163.

It is an arithmetic number, because the mean of its divisors is an integer number (298389041760).

Almost surely, 2^{22011210022221} is an apocalyptic number.

22011210022221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22011210022221 is a deficient number, since it is larger than the sum of its proper divisors (16182587323059).

22011210022221 is a wasteful number, since it uses less digits than its factorization.

22011210022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32544 (or 32538 counting only the distinct ones).

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

Adding to 22011210022221 its reverse (12222001211022), we get a palindrome (34233211233243).

The spelling of 22011210022221 in words is "twenty-two trillion, eleven billion, two hundred ten million, twenty-two thousand, two hundred twenty-one".