12010212221221 has 4 divisors (see below), whose sum is σ = 12010223123244. Its totient is φ = 12010201319200.

The previous prime is 12010212221213. The next prime is 12010212221339. The reversal of 12010212221221 is 12212221201021.

12010212221221 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 8385049533025 + 3625162688196 = 2895695^2 + 1903986^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010212221221 - 2³ = 12010212221213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010212221521) 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, 3585790 + ... + 6072751.

It is an arithmetic number, because the mean of its divisors is an integer number (3002555780811).

Almost surely, 2^{12010212221221} is an apocalyptic number.

It is an amenable number.

12010212221221 is a deficient number, since it is larger than the sum of its proper divisors (10902023).

12010212221221 is an equidigital number, since it uses as much as digits as its factorization.

12010212221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10902022.

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

Adding to 12010212221221 its reverse (12212221201021), we get a palindrome (24222433422242).

The spelling of 12010212221221 in words is "twelve trillion, ten billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".