12011110122221 has 8 divisors (see below), whose sum is σ = 14323808344704. Its totient is φ = 9847618236720.

The previous prime is 12011110122181. The next prime is 12011110122239. The reversal of 12011110122221 is 12222101111021.

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

It is not a de Polignac number, because 12011110122221 - 2¹⁴ = 12011110105837 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 12011110122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011110122241) 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, 37301584070 + ... + 37301584391.

It is an arithmetic number, because the mean of its divisors is an integer number (1790476043088).

Almost surely, 2^{12011110122221} is an apocalyptic number.

It is an amenable number.

12011110122221 is a deficient number, since it is larger than the sum of its proper divisors (2312698222483).

12011110122221 is an equidigital number, since it uses as much as digits as its factorization.

12011110122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74603168491.

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

Adding to 12011110122221 its reverse (12222101111021), we get a palindrome (24233211233242).

The spelling of 12011110122221 in words is "twelve trillion, eleven billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".