111742402021643 has 4 divisors (see below), whose sum is σ = 111745854836568. Its totient is φ = 111738949206720.

The previous prime is 111742402021583. The next prime is 111742402021717. The reversal of 111742402021643 is 346120204247111.

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

It is a cyclic number.

It is not a de Polignac number, because 111742402021643 - 2¹⁴ = 111742402005259 is a prime.

It is a super-2 number, since 2×111742402021643² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111742402021597 and 111742402021606.

It is not an unprimeable number, because it can be changed into a prime (111742402021343) 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, 1726358918 + ... + 1726423643.

It is an arithmetic number, because the mean of its divisors is an integer number (27936463709142).

Almost surely, 2^{111742402021643} is an apocalyptic number.

111742402021643 is a deficient number, since it is larger than the sum of its proper divisors (3452814925).

111742402021643 is an equidigital number, since it uses as much as digits as its factorization.

111742402021643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452814924.

The product of its (nonzero) digits is 64512, while the sum is 38.

Adding to 111742402021643 its reverse (346120204247111), we get a palindrome (457862606268754).

The spelling of 111742402021643 in words is "one hundred eleven trillion, seven hundred forty-two billion, four hundred two million, twenty-one thousand, six hundred forty-three".