111100121211 has 4 divisors (see below), whose sum is σ = 148133494952. Its totient is φ = 74066747472.

The previous prime is 111100121189. The next prime is 111100121213. The reversal of 111100121211 is 112121001111.

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

It is not a de Polignac number, because 111100121211 - 2⁹ = 111100120699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111100121213) 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, 18516686866 + ... + 18516686871.

It is an arithmetic number, because the mean of its divisors is an integer number (37033373738).

Almost surely, 2^111100121211 is an apocalyptic number.

111100121211 is a deficient number, since it is larger than the sum of its proper divisors (37033373741).

111100121211 is an equidigital number, since it uses as much as digits as its factorization.

111100121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37033373740.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111100121211 its reverse (112121001111), we get a palindrome (223221122322).

The spelling of 111100121211 in words is "one hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred eleven".