22210021221 has 16 divisors (see below), whose sum is σ = 30280428288. Its totient is φ = 14473918400.

The previous prime is 22210021219. The next prime is 22210021243. The reversal of 22210021221 is 12212001222.

It is a cyclic number.

It is not a de Polignac number, because 22210021221 - 2¹ = 22210021219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22210021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19831 + ... + 211691.

It is an arithmetic number, because the mean of its divisors is an integer number (1892526768).

Almost surely, 2^22210021221 is an apocalyptic number.

It is an amenable number.

22210021221 is a deficient number, since it is larger than the sum of its proper divisors (8070407067).

22210021221 is a wasteful number, since it uses less digits than its factorization.

22210021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192732.

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

Adding to 22210021221 its reverse (12212001222), we get a palindrome (34422022443).

The spelling of 22210021221 in words is "twenty-two billion, two hundred ten million, twenty-one thousand, two hundred twenty-one".