111211200012121 has 8 divisors (see below), whose sum is σ = 121389352484544. Its totient is φ = 101044388103120.

The previous prime is 111211200012079. The next prime is 111211200012197. The reversal of 111211200012121 is 121210002112111.

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

It is not a de Polignac number, because 111211200012121 - 2⁹ = 111211200011609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211200012095 and 111211200012104.

It is not an unprimeable number, because it can be changed into a prime (111211200072121) 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, 2835120346 + ... + 2835159571.

It is an arithmetic number, because the mean of its divisors is an integer number (15173669060568).

Almost surely, 2^{111211200012121} is an apocalyptic number.

111211200012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111211200012121 is a deficient number, since it is larger than the sum of its proper divisors (10178152472423).

111211200012121 is a wasteful number, since it uses less digits than its factorization.

111211200012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670281711.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111211200012121 its reverse (121210002112111), we get a palindrome (232421202124232).

The spelling of 111211200012121 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred million, twelve thousand, one hundred twenty-one".