1111085021731 has 4 divisors (see below), whose sum is σ = 1112670022464. Its totient is φ = 1109500021000.

The previous prime is 1111085021713. The next prime is 1111085021743. The reversal of 1111085021731 is 1371205801111.

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 1111085021731 - 2²¹ = 1111082924579 is a prime.

It is a super-2 number, since 2×1111085021731² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111085021693 and 1111085021702.

It is not an unprimeable number, because it can be changed into a prime (1111085021791) 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, 792499315 + ... + 792500716.

It is an arithmetic number, because the mean of its divisors is an integer number (278167505616).

Almost surely, 2^{1111085021731} is an apocalyptic number.

1111085021731 is a deficient number, since it is larger than the sum of its proper divisors (1585000733).

1111085021731 is an equidigital number, since it uses as much as digits as its factorization.

1111085021731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585000732.

The product of its (nonzero) digits is 1680, while the sum is 31.

The spelling of 1111085021731 in words is "one trillion, one hundred eleven billion, eighty-five million, twenty-one thousand, seven hundred thirty-one".