20021001222112 has 96 divisors (see below), whose sum is σ = 44008620606720. Its totient is φ = 8887002808320.

The previous prime is 20021001222107. The next prime is 20021001222119. The reversal of 20021001222112 is 21122210012002.

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 not an unprimeable number, because it can be changed into a prime (20021001222119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75441589 + ... + 75706507.

It is an arithmetic number, because the mean of its divisors is an integer number (458423131320).

Almost surely, 2^{20021001222112} is an apocalyptic number.

20021001222112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021001222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22004310303360).

20021001222112 is an abundant number, since it is smaller than the sum of its proper divisors (23987619384608).

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

20021001222112 is a wasteful number, since it uses less digits than its factorization.

20021001222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269976 (or 269968 counting only the distinct ones).

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

Adding to 20021001222112 its reverse (21122210012002), we get a palindrome (41143211234114).

The spelling of 20021001222112 in words is "twenty trillion, twenty-one billion, one million, two hundred twenty-two thousand, one hundred twelve".