12111122202121 has 8 divisors (see below), whose sum is σ = 12637770526080. Its totient is φ = 11584480360992.

The previous prime is 12111122202019. The next prime is 12111122202133. The reversal of 12111122202121 is 12120222111121.

It is a happy number.

12111122202121 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 12111122202121 - 2⁴¹ = 9912098946569 is a prime.

It is a super-4 number, since 4×12111122202121⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111122262121) 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, 2410236 + ... + 5480098.

It is an arithmetic number, because the mean of its divisors is an integer number (1579721315760).

Almost surely, 2^{12111122202121} is an apocalyptic number.

It is an amenable number.

12111122202121 is a deficient number, since it is larger than the sum of its proper divisors (526648323959).

12111122202121 is a wasteful number, since it uses less digits than its factorization.

12111122202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241415.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12111122202121 its reverse (12120222111121), we get a palindrome (24231344313242).

The spelling of 12111122202121 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-one".