22120012221 has 8 divisors (see below), whose sum is σ = 29669957184. Its totient is φ = 14658371040.

The previous prime is 22120012217. The next prime is 22120012231. The reversal of 22120012221 is 12221002122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22120012221 - 2² = 22120012217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22120012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120012231) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22075360 + ... + 22076361.

It is an arithmetic number, because the mean of its divisors is an integer number (3708744648).

Almost surely, 2^22120012221 is an apocalyptic number.

It is an amenable number.

22120012221 is a deficient number, since it is larger than the sum of its proper divisors (7549944963).

22120012221 is a wasteful number, since it uses less digits than its factorization.

22120012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44151891.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22120012221 its reverse (12221002122), we get a palindrome (34341014343).

The spelling of 22120012221 in words is "twenty-two billion, one hundred twenty million, twelve thousand, two hundred twenty-one".