22120012020221 has 16 divisors (see below), whose sum is σ = 23306486712000. Its totient is φ = 20935768032000.

The previous prime is 22120012020217. The next prime is 22120012020241. The reversal of 22120012020221 is 12202021002122.

It is a happy number.

It is not a de Polignac number, because 22120012020221 - 2² = 22120012020217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22120012020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120012020241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199405430 + ... + 199516328.

It is an arithmetic number, because the mean of its divisors is an integer number (1456655419500).

Almost surely, 2^{22120012020221} is an apocalyptic number.

It is an amenable number.

22120012020221 is a deficient number, since it is larger than the sum of its proper divisors (1186474691779).

22120012020221 is a wasteful number, since it uses less digits than its factorization.

22120012020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120860.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22120012020221 its reverse (12202021002122), we get a palindrome (34322033022343).

The spelling of 22120012020221 in words is "twenty-two trillion, one hundred twenty billion, twelve million, twenty thousand, two hundred twenty-one".