12221020020 has 96 divisors (see below), whose sum is σ = 39294420480. Its totient is φ = 2806738560.

The previous prime is 12221020013. The next prime is 12221020033. The reversal of 12221020020 is 2002012221.

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 = 12221019978 and 12221020005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474742 + ... + 499821.

It is an arithmetic number, because the mean of its divisors is an integer number (409316880).

Almost surely, 2^12221020020 is an apocalyptic number.

12221020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221020020 is an abundant number, since it is smaller than the sum of its proper divisors (27073400460).

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

12221020020 is a wasteful number, since it uses less digits than its factorization.

12221020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974605 (or 974603 counting only the distinct ones).

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

Adding to 12221020020 its reverse (2002012221), we get a palindrome (14223032241).

The spelling of 12221020020 in words is "twelve billion, two hundred twenty-one million, twenty thousand, twenty".