12122222020 has 96 divisors (see below), whose sum is σ = 27022786560. Its totient is φ = 4560554880.

The previous prime is 12122221981. The next prime is 12122222027. The reversal of 12122222020 is 2022222121.

It is a junction number, because it is equal to n+sod(n) for n = 12122221985 and 12122222003.

It is not an unprimeable number, because it can be changed into a prime (12122222027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5944161 + ... + 5946199.

It is an arithmetic number, because the mean of its divisors is an integer number (281487360).

Almost surely, 2^12122222020 is an apocalyptic number.

12122222020 is a gapful number since it is divisible by the number (10) 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 12122222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13511393280).

12122222020 is an abundant number, since it is smaller than the sum of its proper divisors (14900564540).

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

12122222020 is a wasteful number, since it uses less digits than its factorization.

12122222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12122222020 its reverse (2022222121), we get a palindrome (14144444141).

The spelling of 12122222020 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty".