12202121221000 has 64 divisors (see below), whose sum is σ = 28557235278000. Its totient is φ = 4880118297600.

The previous prime is 12202121220997. The next prime is 12202121221001. The reversal of 12202121221000 is 12212120221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 49409287524 + 12152711933476 = 222282^2 + 3486074^2 .

It is not an unprimeable number, because it can be changed into a prime (12202121221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5799616 + ... + 7618384.

Almost surely, 2^{12202121221000} is an apocalyptic number.

12202121221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12202121221000 is an abundant number, since it is smaller than the sum of its proper divisors (16355114057000).

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

12202121221000 is a wasteful number, since it uses less digits than its factorization.

12202121221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825499 (or 1825485 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12202121221000 its reverse (12212120221), we get a palindrome (12214333341221).

The spelling of 12202121221000 in words is "twelve trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand".