111105556061 has 4 divisors (see below), whose sum is σ = 111106348224. Its totient is φ = 111104763900.

The previous prime is 111105556049. The next prime is 111105556097. The reversal of 111105556061 is 160655501111.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111105556061 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 (111105516061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122885 + ... + 487146.

It is an arithmetic number, because the mean of its divisors is an integer number (27776587056).

Almost surely, 2^111105556061 is an apocalyptic number.

It is an amenable number.

111105556061 is a deficient number, since it is larger than the sum of its proper divisors (792163).

111105556061 is an equidigital number, since it uses as much as digits as its factorization.

111105556061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792162.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 111105556061 in words is "one hundred eleven billion, one hundred five million, five hundred fifty-six thousand, sixty-one".