111211020111 has 16 divisors (see below), whose sum is σ = 149218509440. Its totient is φ = 73672273440.

The previous prime is 111211020103. The next prime is 111211020113. The reversal of 111211020111 is 111020112111.

It is not a de Polignac number, because 111211020111 - 2³ = 111211020103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211020113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3122160 + ... + 3157578.

It is an arithmetic number, because the mean of its divisors is an integer number (9326156840).

Almost surely, 2^111211020111 is an apocalyptic number.

111211020111 is a deficient number, since it is larger than the sum of its proper divisors (38007489329).

111211020111 is a wasteful number, since it uses less digits than its factorization.

111211020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42006.

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

Adding to 111211020111 its reverse (111020112111), we get a palindrome (222231132222).

The spelling of 111211020111 in words is "one hundred eleven billion, two hundred eleven million, twenty thousand, one hundred eleven".