12122122021220 has 48 divisors (see below), whose sum is σ = 25490511124848. Its totient is φ = 4842366259200.

The previous prime is 12122122021201. The next prime is 12122122021271. The reversal of 12122122021220 is 2212022122121.

It can be written as a sum of positive squares in 8 ways, for example, as 5214865497664 + 6907256523556 = 2283608^2 + 2628166^2 .

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 = 12122122021192 and 12122122021201.

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, 47841584 + ... + 48094296.

It is an arithmetic number, because the mean of its divisors is an integer number (531052315101).

Almost surely, 2^{12122122021220} is an apocalyptic number.

12122122021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122122021220 is an abundant number, since it is smaller than the sum of its proper divisors (13368389103628).

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

12122122021220 is a wasteful number, since it uses less digits than its factorization.

12122122021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255920 (or 255918 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12122122021220 its reverse (2212022122121), we get a palindrome (14334144143341).

The spelling of 12122122021220 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty".