22021120221 has 8 divisors (see below), whose sum is σ = 31088640384. Its totient is φ = 13817173440.

The previous prime is 22021120151. The next prime is 22021120229. The reversal of 22021120221 is 12202112022.

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

It is not a de Polignac number, because 22021120221 - 2¹⁵ = 22021087453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021120229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215893285 + ... + 215893386.

It is an arithmetic number, because the mean of its divisors is an integer number (3886080048).

Almost surely, 2^22021120221 is an apocalyptic number.

It is an amenable number.

22021120221 is a deficient number, since it is larger than the sum of its proper divisors (9067520163).

22021120221 is a wasteful number, since it uses less digits than its factorization.

22021120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431786691.

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

Adding to 22021120221 its reverse (12202112022), we get a palindrome (34223232243).

The spelling of 22021120221 in words is "twenty-two billion, twenty-one million, one hundred twenty thousand, two hundred twenty-one".