12021201221122 has 4 divisors (see below), whose sum is σ = 18031801831686. Its totient is φ = 6010600610560.

The previous prime is 12021201221023. The next prime is 12021201221123. The reversal of 12021201221122 is 22112210212021.

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., 10245562355161 + 1775638865961 = 3200869^2 + 1332531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021201221122.

It is not an unprimeable number, because it can be changed into a prime (12021201221123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005300305279 + ... + 3005300305282.

Almost surely, 2^{12021201221122} is an apocalyptic number.

12021201221122 is a deficient number, since it is larger than the sum of its proper divisors (6010600610564).

12021201221122 is an equidigital number, since it uses as much as digits as its factorization.

12021201221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010600610563.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12021201221122 its reverse (22112210212021), we get a palindrome (34133411433143).

It can be divided in two parts, 1202120 and 1221122, that added together give a palindrome (2423242).

The spelling of 12021201221122 in words is "twelve trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-two".