111210121211111 has 8 divisors (see below), whose sum is σ = 126068153599920. Its totient is φ = 97252575633792.

The previous prime is 111210121211093. The next prime is 111210121211131. The reversal of 111210121211111 is 111112121012111.

It is a happy number.

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 111210121211111 - 2¹⁰ = 111210121210087 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 111210121211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210121211131) 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, 225121702610 + ... + 225121703103.

It is an arithmetic number, because the mean of its divisors is an integer number (15758519199990).

Almost surely, 2^{111210121211111} is an apocalyptic number.

111210121211111 is a deficient number, since it is larger than the sum of its proper divisors (14858032388809).

111210121211111 is a wasteful number, since it uses less digits than its factorization.

111210121211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450243405745.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111210121211111 its reverse (111112121012111), we get a palindrome (222322242223222).

The spelling of 111210121211111 in words is "one hundred eleven trillion, two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, one hundred eleven".