22220121222020 has 48 divisors (see below), whose sum is σ = 47156944283568. Its totient is φ = 8793874882560.

The previous prime is 22220121221993. The next prime is 22220121222073. The reversal of 22220121222020 is 2022212102222.

It can be written as a sum of positive squares in 8 ways, for example, as 6036573819136 + 16183547402884 = 2456944^2 + 4022878^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22220121221983 and 22220121222001.

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, 5059664 + ... + 8369016.

It is an arithmetic number, because the mean of its divisors is an integer number (982436339241).

Almost surely, 2^{22220121222020} is an apocalyptic number.

22220121222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220121222020 is an abundant number, since it is smaller than the sum of its proper divisors (24936823061548).

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

22220121222020 is a wasteful number, since it uses less digits than its factorization.

22220121222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312920 (or 3312918 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22220121222020 its reverse (2022212102222), we get a palindrome (24242333324242).

The spelling of 22220121222020 in words is "twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".