12022121220 has 24 divisors (see below), whose sum is σ = 33661939584. Its totient is φ = 3205898976.

The previous prime is 12022121197. The next prime is 12022121231. The reversal of 12022121220 is 2212122021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12022121220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100184284 + ... + 100184403.

It is an arithmetic number, because the mean of its divisors is an integer number (1402580816).

Almost surely, 2^12022121220 is an apocalyptic number.

12022121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12022121220 is an abundant number, since it is smaller than the sum of its proper divisors (21639818364).

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

12022121220 is a wasteful number, since it uses less digits than its factorization.

12022121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200368699 (or 200368697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12022121220 its reverse (2212122021), we get a palindrome (14234243241).

The spelling of 12022121220 in words is "twelve billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty".