111106551061 has 4 divisors (see below), whose sum is σ = 121207146624. Its totient is φ = 101005955500.

The previous prime is 111106551013. The next prime is 111106551067. The reversal of 111106551061 is 160155601111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160155601111 = 11 ⋅14559600101.

It is a cyclic number.

It is not a de Polignac number, because 111106551061 - 2¹⁷ = 111106419989 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 (111106551067) 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 3 ways as a sum of consecutive naturals, for example, 5050297765 + ... + 5050297786.

It is an arithmetic number, because the mean of its divisors is an integer number (30301786656).

Almost surely, 2^111106551061 is an apocalyptic number.

111106551061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111106551061 is a deficient number, since it is larger than the sum of its proper divisors (10100595563).

111106551061 is a wasteful number, since it uses less digits than its factorization.

111106551061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100595562.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 111106551061 in words is "one hundred eleven billion, one hundred six million, five hundred fifty-one thousand, sixty-one".