12221200002122 has 4 divisors (see below), whose sum is σ = 18331800003186. Its totient is φ = 6110600001060.

The previous prime is 12221200002029. The next prime is 12221200002139. The reversal of 12221200002122 is 22120000212221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11580061896601 + 641138105521 = 3402949^2 + 800711^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12221200002122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055300000529 + ... + 3055300000532.

Almost surely, 2^{12221200002122} is an apocalyptic number.

12221200002122 is a deficient number, since it is larger than the sum of its proper divisors (6110600001064).

12221200002122 is an equidigital number, since it uses as much as digits as its factorization.

12221200002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110600001063.

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

Adding to 12221200002122 its reverse (22120000212221), we get a palindrome (34341200214343).

The spelling of 12221200002122 in words is "twelve trillion, two hundred twenty-one billion, two hundred million, two thousand, one hundred twenty-two".