111204034121 has 4 divisors (see below), whose sum is σ = 111204705744. Its totient is φ = 111203362500.

The previous prime is 111204034099. The next prime is 111204034127. The reversal of 111204034121 is 121430402111.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121430402111 = 617 ⋅196807783.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111204034121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111204034093 and 111204034102.

It is not an unprimeable number, because it can be changed into a prime (111204034127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108566 + ... + 483936.

It is an arithmetic number, because the mean of its divisors is an integer number (27801176436).

Almost surely, 2^111204034121 is an apocalyptic number.

It is an amenable number.

111204034121 is a deficient number, since it is larger than the sum of its proper divisors (671623).

111204034121 is an equidigital number, since it uses as much as digits as its factorization.

111204034121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671622.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111204034121 its reverse (121430402111), we get a palindrome (232634436232).

The spelling of 111204034121 in words is "one hundred eleven billion, two hundred four million, thirty-four thousand, one hundred twenty-one".