12012221121101 has 8 divisors (see below), whose sum is σ = 12015188384184. Its totient is φ = 12009254129920.

The previous prime is 12012221121091. The next prime is 12012221121113. The reversal of 12012221121101 is 10112112221021.

It can be written as a sum of positive squares in 4 ways, for example, as 1847155528201 + 10165065592900 = 1359101^2 + 3188270^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012221121101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012221121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012221181101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109185761 + ... + 109295721.

It is an arithmetic number, because the mean of its divisors is an integer number (1501898548023).

Almost surely, 2^{12012221121101} is an apocalyptic number.

It is an amenable number.

12012221121101 is a deficient number, since it is larger than the sum of its proper divisors (2967263083).

12012221121101 is a wasteful number, since it uses less digits than its factorization.

12012221121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135951.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12012221121101 its reverse (10112112221021), we get a palindrome (22124333342122).

The spelling of 12012221121101 in words is "twelve trillion, twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".