12200122221 has 32 divisors (see below), whose sum is σ = 19112368128. Its totient is φ = 6776239680.

The previous prime is 12200122213. The next prime is 12200122223. The reversal of 12200122221 is 12222100221.

It is not a de Polignac number, because 12200122221 - 2³ = 12200122213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12200122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200122223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 818566 + ... + 833336.

It is an arithmetic number, because the mean of its divisors is an integer number (597261504).

Almost surely, 2^12200122221 is an apocalyptic number.

It is an amenable number.

12200122221 is a deficient number, since it is larger than the sum of its proper divisors (6912245907).

12200122221 is a wasteful number, since it uses less digits than its factorization.

12200122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15881.

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

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

It can be divided in two parts, 12200122 and 221, that multiplied together give a palindrome (2696226962).

The spelling of 12200122221 in words is "twelve billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".