12222100221 has 8 divisors (see below), whose sum is σ = 16736569824. Its totient is φ = 7927848720.

The previous prime is 12222100217. The next prime is 12222100229. The reversal of 12222100221 is 12200122221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12222100221 - 2² = 12222100217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12222100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222100229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55054395 + ... + 55054616.

It is an arithmetic number, because the mean of its divisors is an integer number (2092071228).

Almost surely, 2^12222100221 is an apocalyptic number.

It is an amenable number.

12222100221 is a deficient number, since it is larger than the sum of its proper divisors (4514469603).

12222100221 is a wasteful number, since it uses less digits than its factorization.

12222100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110109051.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12222100221 its reverse (12200122221), we get a palindrome (24422222442).

It can be divided in two parts, 122 and 22100221, that multiplied together give a palindrome (2696226962).

The spelling of 12222100221 in words is "twelve billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-one".