21120222020022 has 128 divisors (see below), whose sum is σ = 49218478848000. Its totient is φ = 6705660245760.

The previous prime is 21120222019997. The next prime is 21120222020041. The reversal of 21120222020022 is 22002022202112.

21120222020022 is a `hidden beast` number, since 21 + 1 + 202 + 220 + 200 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21120222019977 and 21120222020004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 219773379 + ... + 219869457.

It is an arithmetic number, because the mean of its divisors is an integer number (384519366000).

Almost surely, 2^{21120222020022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21120222020022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24609239424000).

21120222020022 is an abundant number, since it is smaller than the sum of its proper divisors (28098256827978).

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

21120222020022 is a wasteful number, since it uses less digits than its factorization.

21120222020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98483 (or 98477 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21120222020022 its reverse (22002022202112), we get a palindrome (43122244222134).

The spelling of 21120222020022 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, twenty thousand, twenty-two".