111642121107 has 12 divisors (see below), whose sum is σ = 175920918264. Its totient is φ = 67661891520.

The previous prime is 111642121099. The next prime is 111642121117. The reversal of 111642121107 is 701121246111.

111642121107 is a `hidden beast` number, since 1 + 1 + 1 + 642 + 1 + 2 + 1 + 10 + 7 = 666.

It is not a de Polignac number, because 111642121107 - 2³ = 111642121099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111642121117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563848998 + ... + 563849195.

It is an arithmetic number, because the mean of its divisors is an integer number (14660076522).

Almost surely, 2^111642121107 is an apocalyptic number.

111642121107 is a deficient number, since it is larger than the sum of its proper divisors (64278797157).

111642121107 is a wasteful number, since it uses less digits than its factorization.

111642121107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127698210 (or 1127698207 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

Adding to 111642121107 its reverse (701121246111), we get a palindrome (812763367218).

The spelling of 111642121107 in words is "one hundred eleven billion, six hundred forty-two million, one hundred twenty-one thousand, one hundred seven".