111211120212111 has 48 divisors (see below), whose sum is σ = 169203768797440. Its totient is φ = 70192573315200.

The previous prime is 111211120212107. The next prime is 111211120212251. The reversal of 111211120212111 is 111212021112111.

111211120212111 is a `hidden beast` number, since 1 + 11 + 211 + 120 + 212 + 111 = 666.

It is not a de Polignac number, because 111211120212111 - 2² = 111211120212107 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 (111211120212611) 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 47 ways as a sum of consecutive naturals, for example, 2619731436 + ... + 2619773886.

Almost surely, 2^{111211120212111} is an apocalyptic number.

111211120212111 is a deficient number, since it is larger than the sum of its proper divisors (57992648585329).

111211120212111 is a wasteful number, since it uses less digits than its factorization.

111211120212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52156 (or 52153 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111211120212111 its reverse (111212021112111), we get a palindrome (222423141324222).

The spelling of 111211120212111 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty million, two hundred twelve thousand, one hundred eleven".