111211122121201 has 8 divisors (see below), whose sum is σ = 111384803065824. Its totient is φ = 111037477994880.

The previous prime is 111211122121181. The next prime is 111211122121283. The reversal of 111211122121201 is 102121221112111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211122121201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211122121601) 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, 3155680 + ... + 15244033.

It is an arithmetic number, because the mean of its divisors is an integer number (13923100383228).

Almost surely, 2^{111211122121201} is an apocalyptic number.

It is an amenable number.

111211122121201 is a deficient number, since it is larger than the sum of its proper divisors (173680944623).

111211122121201 is an equidigital number, since it uses as much as digits as its factorization.

111211122121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18409151.

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

Adding to 111211122121201 its reverse (102121221112111), we get a palindrome (213332343233312).

The spelling of 111211122121201 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred one".