22121120122020 has 144 divisors (see below), whose sum is σ = 69592300185408. Its totient is φ = 5898426480000.

The previous prime is 22121120121983. The next prime is 22121120122037. The reversal of 22121120122020 is 2022102112122.

It is a happy number.

22121120122020 is a `hidden beast` number, since 2 + 212 + 11 + 201 + 220 + 20 = 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 = 22121120121984 and 22121120122002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54477582 + ... + 54882138.

Almost surely, 2^{22121120122020} is an apocalyptic number.

22121120122020 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 22121120122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34796150092704).

22121120122020 is an abundant number, since it is smaller than the sum of its proper divisors (47471180063388).

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

22121120122020 is a wasteful number, since it uses less digits than its factorization.

22121120122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415832 (or 415818 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22121120122020 its reverse (2022102112122), we get a palindrome (24143222234142).

The spelling of 22121120122020 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, twenty".