111312054062661 has 4 divisors (see below), whose sum is σ = 148416072083552. Its totient is φ = 74208036041772.

The previous prime is 111312054062639. The next prime is 111312054062669. The reversal of 111312054062661 is 166260450213111.

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.

It is not a de Polignac number, because 111312054062661 - 2²⁷ = 111311919844933 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 (111312054062669) 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, 18552009010441 + ... + 18552009010446.

It is an arithmetic number, because the mean of its divisors is an integer number (37104018020888).

Almost surely, 2^{111312054062661} is an apocalyptic number.

It is an amenable number.

111312054062661 is a deficient number, since it is larger than the sum of its proper divisors (37104018020891).

111312054062661 is an equidigital number, since it uses as much as digits as its factorization.

111312054062661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37104018020890.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 111312054062661 in words is "one hundred eleven trillion, three hundred twelve billion, fifty-four million, sixty-two thousand, six hundred sixty-one".