1111085021749 has 4 divisors (see below), whose sum is σ = 1111212142380. Its totient is φ = 1110957901120.

The previous prime is 1111085021747. The next prime is 1111085021759. The reversal of 1111085021749 is 9471205801111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135843844900 + 975241176849 = 368570^2 + 987543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111085021749 - 2¹ = 1111085021747 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 (1111085021743) 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, 63547204 + ... + 63564685.

It is an arithmetic number, because the mean of its divisors is an integer number (277803035595).

Almost surely, 2^{1111085021749} is an apocalyptic number.

It is an amenable number.

1111085021749 is a deficient number, since it is larger than the sum of its proper divisors (127120631).

1111085021749 is an equidigital number, since it uses as much as digits as its factorization.

1111085021749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127120630.

The product of its (nonzero) digits is 20160, while the sum is 40.

The spelling of 1111085021749 in words is "one trillion, one hundred eleven billion, eighty-five million, twenty-one thousand, seven hundred forty-nine".