22143121123221 has 12 divisors (see below), whose sum is σ = 36553723759072. Its totient is φ = 12653212070376.

The previous prime is 22143121123219. The next prime is 22143121123231. The reversal of 22143121123221 is 12232112134122.

22143121123221 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 312 + 1 + 123 + 221 = 666.

It is not a de Polignac number, because 22143121123221 - 2¹ = 22143121123219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143121123231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175739056471 + ... + 175739056596.

Almost surely, 2^{22143121123221} is an apocalyptic number.

22143121123221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22143121123221 is a deficient number, since it is larger than the sum of its proper divisors (14410602635851).

22143121123221 is a wasteful number, since it uses less digits than its factorization.

22143121123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351478113080 (or 351478113077 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 22143121123221 its reverse (12232112134122), we get a palindrome (34375233257343).

The spelling of 22143121123221 in words is "twenty-two trillion, one hundred forty-three billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-one".