21112022221120 has 112 divisors (see below), whose sum is σ = 50370055652880. Its totient is φ = 8428516540416.

The previous prime is 21112022221067. The next prime is 21112022221349. The reversal of 21112022221120 is 2112222021112.

It can be written as a sum of positive squares in 8 ways, for example, as 911887485184 + 20200134735936 = 954928^2 + 4494456^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561874654 + ... + 561912226.

Almost surely, 2^{21112022221120} is an apocalyptic number.

21112022221120 is a gapful number since it is divisible by the number (20) 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 21112022221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25185027826440).

21112022221120 is an abundant number, since it is smaller than the sum of its proper divisors (29258033431760).

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

21112022221120 is a wasteful number, since it uses less digits than its factorization.

21112022221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40932 (or 40922 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112022221120 its reverse (2112222021112), we get a palindrome (23224244242232).

The spelling of 21112022221120 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred twenty-one thousand, one hundred twenty".