111001201121 has 4 divisors (see below), whose sum is σ = 112038595632. Its totient is φ = 109963806612.

The previous prime is 111001201097. The next prime is 111001201133. The reversal of 111001201121 is 121102100111.

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 an emirpimes, since its reverse is a distinct semiprime: 121102100111 = 571 ⋅212087741.

It is a cyclic number.

It is not a de Polignac number, because 111001201121 - 2¹⁰ = 111001200097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111001201151) 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, 518697095 + ... + 518697308.

It is an arithmetic number, because the mean of its divisors is an integer number (28009648908).

Almost surely, 2^111001201121 is an apocalyptic number.

It is an amenable number.

111001201121 is a deficient number, since it is larger than the sum of its proper divisors (1037394511).

111001201121 is a wasteful number, since it uses less digits than its factorization.

111001201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037394510.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111001201121 its reverse (121102100111), we get a palindrome (232103301232).

The spelling of 111001201121 in words is "one hundred eleven billion, one million, two hundred one thousand, one hundred twenty-one".