111742402021606 has 4 divisors (see below), whose sum is σ = 167613603032412. Its totient is φ = 55871201010802.

The previous prime is 111742402021583. The next prime is 111742402021717. The reversal of 111742402021606 is 606120204247111.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27935600505400 + ... + 27935600505403.

It is an arithmetic number, because the mean of its divisors is an integer number (41903400758103).

Almost surely, 2^{111742402021606} is an apocalyptic number.

111742402021606 is a deficient number, since it is larger than the sum of its proper divisors (55871201010806).

111742402021606 is an equidigital number, since it uses as much as digits as its factorization.

111742402021606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55871201010805.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 111742402021606 its reverse (606120204247111), we get a palindrome (717862606268717).

The spelling of 111742402021606 in words is "one hundred eleven trillion, seven hundred forty-two billion, four hundred two million, twenty-one thousand, six hundred six".