111000112121 has 4 divisors (see below), whose sum is σ = 111000780132. Its totient is φ = 110999444112.

The previous prime is 111000112063. The next prime is 111000112127. The reversal of 111000112121 is 121211000111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 63622495225 + 47377616896 = 252235^2 + 217664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111000112121 is a prime.

It is a super-2 number, since 2×111000112121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111000112127) 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, 131531 + ... + 489183.

It is an arithmetic number, because the mean of its divisors is an integer number (27750195033).

Almost surely, 2^111000112121 is an apocalyptic number.

It is an amenable number.

111000112121 is a deficient number, since it is larger than the sum of its proper divisors (668011).

111000112121 is an equidigital number, since it uses as much as digits as its factorization.

111000112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668010.

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

Adding to 111000112121 its reverse (121211000111), we get a palindrome (232211112232).

The spelling of 111000112121 in words is "one hundred eleven billion, one hundred twelve thousand, one hundred twenty-one".