111001121011 has 4 divisors (see below), whose sum is σ = 121092132024. Its totient is φ = 100910110000.

The previous prime is 111001121003. The next prime is 111001121029. The reversal of 111001121011 is 110121100111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110121100111 = 11 ⋅10011009101.

It is a cyclic number.

It is not a de Polignac number, because 111001121011 - 2³ = 111001121003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111001121071) 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, 5045505490 + ... + 5045505511.

It is an arithmetic number, because the mean of its divisors is an integer number (30273033006).

Almost surely, 2^111001121011 is an apocalyptic number.

111001121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111001121011 is a deficient number, since it is larger than the sum of its proper divisors (10091011013).

111001121011 is a wasteful number, since it uses less digits than its factorization.

111001121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091011012.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 111001121011 its reverse (110121100111), we get a palindrome (221122221122).

The spelling of 111001121011 in words is "one hundred eleven billion, one million, one hundred twenty-one thousand, eleven".