111200121011 has 4 divisors (see below), whose sum is σ = 127085852592. Its totient is φ = 95314389432.

The previous prime is 111200121007. The next prime is 111200121029. The reversal of 111200121011 is 110121002111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111200121011 - 2² = 111200121007 is a prime.

It is a super-2 number, since 2×111200121011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111200120983 and 111200121001.

It is not an unprimeable number, because it can be changed into a prime (111200121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7942865780 + ... + 7942865793.

It is an arithmetic number, because the mean of its divisors is an integer number (31771463148).

Almost surely, 2^111200121011 is an apocalyptic number.

111200121011 is a deficient number, since it is larger than the sum of its proper divisors (15885731581).

111200121011 is an equidigital number, since it uses as much as digits as its factorization.

111200121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15885731580.

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

Adding to 111200121011 its reverse (110121002111), we get a palindrome (221321123122).

The spelling of 111200121011 in words is "one hundred eleven billion, two hundred million, one hundred twenty-one thousand, eleven".