12202112221021 has 4 divisors (see below), whose sum is σ = 12202120876572. Its totient is φ = 12202103565472.

The previous prime is 12202112221009. The next prime is 12202112221031. The reversal of 12202112221021 is 12012221120221.

12202112221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5643831705625 + 6558280515396 = 2375675^2 + 2560914^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202112221021 - 2¹⁷ = 12202112089949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12202112221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202112221001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668466 + ... + 5214211.

It is an arithmetic number, because the mean of its divisors is an integer number (3050530219143).

Almost surely, 2^{12202112221021} is an apocalyptic number.

It is an amenable number.

12202112221021 is a deficient number, since it is larger than the sum of its proper divisors (8655551).

12202112221021 is an equidigital number, since it uses as much as digits as its factorization.

12202112221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8655550.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12202112221021 its reverse (12012221120221), we get a palindrome (24214333341242).

The spelling of 12202112221021 in words is "twelve trillion, two hundred two billion, one hundred twelve million, two hundred twenty-one thousand, twenty-one".