12121022021201 has 4 divisors (see below), whose sum is σ = 12130981777572. Its totient is φ = 12111062264832.

The previous prime is 12121022021177. The next prime is 12121022021219. The reversal of 12121022021201 is 10212022012121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1441622856976 + 10679399164225 = 1200676^2 + 3267935^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121022021201 - 2¹⁸ = 12121021759057 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 12121022021201.

It is not an unprimeable number, because it can be changed into a prime (12121025021201) 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, 4979876360 + ... + 4979878793.

It is an arithmetic number, because the mean of its divisors is an integer number (3032745444393).

Almost surely, 2^{12121022021201} is an apocalyptic number.

It is an amenable number.

12121022021201 is a deficient number, since it is larger than the sum of its proper divisors (9959756371).

12121022021201 is an equidigital number, since it uses as much as digits as its factorization.

12121022021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959756370.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121022021201 its reverse (10212022012121), we get a palindrome (22333044033322).

The spelling of 12121022021201 in words is "twelve trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, two hundred one".