12020221000 has 32 divisors (see below), whose sum is σ = 28127319480. Its totient is φ = 4808088000.

The previous prime is 12020220959. The next prime is 12020221027. The reversal of 12020221000 is 12202021.

It can be written as a sum of positive squares in 4 ways, for example, as 2582875684 + 9437345316 = 50822^2 + 97146^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6009111 + ... + 6011110.

Almost surely, 2^12020221000 is an apocalyptic number.

12020221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020221000 is an abundant number, since it is smaller than the sum of its proper divisors (16107098480).

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

12020221000 is a wasteful number, since it uses less digits than its factorization.

12020221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12020242 (or 12020228 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12020221000 its reverse (12202021), we get a palindrome (12032423021).

The spelling of 12020221000 in words is "twelve billion, twenty million, two hundred twenty-one thousand".