111212211201121 has 16 divisors (see below), whose sum is σ = 111581967067200. Its totient is φ = 110843083368000.

The previous prime is 111212211201101. The next prime is 111212211201257. The reversal of 111212211201121 is 121102112212111.

It is a cyclic number.

It is not a de Polignac number, because 111212211201121 - 2¹¹ = 111212211199073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212211201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5552549335 + ... + 5552569363.

It is an arithmetic number, because the mean of its divisors is an integer number (6973872941700).

Almost surely, 2^{111212211201121} is an apocalyptic number.

It is an amenable number.

111212211201121 is a deficient number, since it is larger than the sum of its proper divisors (369755866079).

111212211201121 is a wasteful number, since it uses less digits than its factorization.

111212211201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34800.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111212211201121 its reverse (121102112212111), we get a palindrome (232314323413232).

The spelling of 111212211201121 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".