111100211102121 has 4 divisors (see below), whose sum is σ = 148133614802832. Its totient is φ = 74066807401412.

The previous prime is 111100211102119. The next prime is 111100211102131. The reversal of 111100211102121 is 121201112001111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111100211102121 - 2¹ = 111100211102119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111100211102121.

It is not an unprimeable number, because it can be changed into a prime (111100211102131) 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 3 ways as a sum of consecutive naturals, for example, 18516701850351 + ... + 18516701850356.

It is an arithmetic number, because the mean of its divisors is an integer number (37033403700708).

Almost surely, 2^{111100211102121} is an apocalyptic number.

It is an amenable number.

111100211102121 is a deficient number, since it is larger than the sum of its proper divisors (37033403700711).

111100211102121 is an equidigital number, since it uses as much as digits as its factorization.

111100211102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37033403700710.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111100211102121 its reverse (121201112001111), we get a palindrome (232301323103232).

The spelling of 111100211102121 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, one hundred two thousand, one hundred twenty-one".