12022021020 has 48 divisors (see below), whose sum is σ = 33691664160. Its totient is φ = 3203014656.

The previous prime is 12022021013. The next prime is 12022021049. The reversal of 12022021020 is 2012022021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12022020987 and 12022021005.

It is a congruent number.

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, 20997 + ... + 156476.

It is an arithmetic number, because the mean of its divisors is an integer number (701909670).

Almost surely, 2^12022021020 is an apocalyptic number.

12022021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12022021020 is an abundant number, since it is smaller than the sum of its proper divisors (21669643140).

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

12022021020 is a wasteful number, since it uses less digits than its factorization.

12022021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178614 (or 178612 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12022021020 its reverse (2012022021), we get a palindrome (14034043041).

The spelling of 12022021020 in words is "twelve billion, twenty-two million, twenty-one thousand, twenty".