111200232121 has 4 divisors (see below), whose sum is σ = 121309344144. Its totient is φ = 101091120100.

The previous prime is 111200232089. The next prime is 111200232131. The reversal of 111200232121 is 121232002111.

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: 121232002111 = 11 ⋅11021091101.

It is a cyclic number.

It is not a de Polignac number, because 111200232121 - 2⁵ = 111200232089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111200232095 and 111200232104.

It is not an unprimeable number, because it can be changed into a prime (111200232131) 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, 5054555995 + ... + 5054556016.

It is an arithmetic number, because the mean of its divisors is an integer number (30327336036).

Almost surely, 2^111200232121 is an apocalyptic number.

111200232121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111200232121 is a deficient number, since it is larger than the sum of its proper divisors (10109112023).

111200232121 is a wasteful number, since it uses less digits than its factorization.

111200232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10109112022.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111200232121 its reverse (121232002111), we get a palindrome (232432234232).

The spelling of 111200232121 in words is "one hundred eleven billion, two hundred million, two hundred thirty-two thousand, one hundred twenty-one".