12212402033221 has 4 divisors (see below), whose sum is σ = 13151817574252. Its totient is φ = 11272986492192.

The previous prime is 12212402033147. The next prime is 12212402033263. The reversal of 12212402033221 is 12233020421221.

12212402033221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8202415808196 + 4009986225025 = 2863986^2 + 2002495^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212402033221 - 2¹⁵ = 12212402000453 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 (12212402036221) 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, 469707770496 + ... + 469707770521.

It is an arithmetic number, because the mean of its divisors is an integer number (3287954393563).

Almost surely, 2^{12212402033221} is an apocalyptic number.

It is an amenable number.

12212402033221 is a deficient number, since it is larger than the sum of its proper divisors (939415541031).

12212402033221 is an equidigital number, since it uses as much as digits as its factorization.

12212402033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939415541030.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12212402033221 its reverse (12233020421221), we get a palindrome (24445422454442).

The spelling of 12212402033221 in words is "twelve trillion, two hundred twelve billion, four hundred two million, thirty-three thousand, two hundred twenty-one".