12111010122221 has 8 divisors (see below), whose sum is σ = 12196581026400. Its totient is φ = 12025496404432.

The previous prime is 12111010122217. The next prime is 12111010122301. The reversal of 12111010122221 is 12222101011121.

12111010122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12111010122221 - 2² = 12111010122217 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 12111010122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111010122121) 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, 13871495 + ... + 14718708.

It is an arithmetic number, because the mean of its divisors is an integer number (1524572628300).

Almost surely, 2^{12111010122221} is an apocalyptic number.

It is an amenable number.

12111010122221 is a deficient number, since it is larger than the sum of its proper divisors (85570904179).

12111010122221 is a wasteful number, since it uses less digits than its factorization.

12111010122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28593195.

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

Adding to 12111010122221 its reverse (12222101011121), we get a palindrome (24333111133342).

The spelling of 12111010122221 in words is "twelve trillion, one hundred eleven billion, ten million, one hundred twenty-two thousand, two hundred twenty-one".