20021222010112 has 72 divisors (see below), whose sum is σ = 42074134724160. Its totient is φ = 9482267381760.

The previous prime is 20021222010071. The next prime is 20021222010137. The reversal of 20021222010112 is 21101022212002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31402533 + ... + 32033755.

It is an arithmetic number, because the mean of its divisors is an integer number (584362982280).

Almost surely, 2^{20021222010112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021222010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21037067362080).

20021222010112 is an abundant number, since it is smaller than the sum of its proper divisors (22052912714048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021222010112 is an equidigital number, since it uses as much as digits as its factorization.

20021222010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637779 (or 637765 counting only the distinct ones).

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

Adding to 20021222010112 its reverse (21101022212002), we get a palindrome (41122244222114).

The spelling of 20021222010112 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, ten thousand, one hundred twelve".