20221221112 has 16 divisors (see below), whose sum is σ = 37934637840. Its totient is φ = 10105317696.

The previous prime is 20221221103. The next prime is 20221221113. The reversal of 20221221112 is 21112212202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221221113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645348 + ... + 675955.

It is an arithmetic number, because the mean of its divisors is an integer number (2370914865).

Almost surely, 2^20221221112 is an apocalyptic number.

It is an amenable number.

20221221112 is a deficient number, since it is larger than the sum of its proper divisors (17713416728).

20221221112 is a wasteful number, since it uses less digits than its factorization.

20221221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323222 (or 1323218 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20221221112 its reverse (21112212202), we get a palindrome (41333433314).

The spelling of 20221221112 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".