111020111111 has 8 divisors (see below), whose sum is σ = 136640136864. Its totient is φ = 87840087840.

The previous prime is 111020111101. The next prime is 111020111129. The reversal of 111020111111 is 111111020111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020111111 is a prime.

111020111111 is a modest number, since divided by 111111 gives 111020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 111020111092 and 111020111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610000520 + ... + 610000701.

It is an arithmetic number, because the mean of its divisors is an integer number (17080017108).

Almost surely, 2^111020111111 is an apocalyptic number.

111020111111 is a deficient number, since it is larger than the sum of its proper divisors (25620025753).

111020111111 is a wasteful number, since it uses less digits than its factorization.

111020111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220001241.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111020111111 its reverse (111111020111), we get a palindrome (222131131222).

It can be divided in two parts, 111020111 and 111, that multiplied together give a palindrome (12323232321).

The spelling of 111020111111 in words is "one hundred eleven billion, twenty million, one hundred eleven thousand, one hundred eleven".