12220012002221 has 4 divisors (see below), whose sum is σ = 12220052293344. Its totient is φ = 12219971711100.

The previous prime is 12220012002217. The next prime is 12220012002251. The reversal of 12220012002221 is 12220021002221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12220012002221 - 2² = 12220012002217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12220012002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220012002251) 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, 19687145 + ... + 20298366.

It is an arithmetic number, because the mean of its divisors is an integer number (3055013073336).

Almost surely, 2^{12220012002221} is an apocalyptic number.

It is an amenable number.

12220012002221 is a deficient number, since it is larger than the sum of its proper divisors (40291123).

12220012002221 is an equidigital number, since it uses as much as digits as its factorization.

12220012002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40291122.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12220012002221 its reverse (12220021002221), we get a palindrome (24440033004442).

Subtracting 12220012002221 from its reverse (12220021002221), we obtain a square (9000000 = 3000²).

The spelling of 12220012002221 in words is "twelve trillion, two hundred twenty billion, twelve million, two thousand, two hundred twenty-one".