1113256811 has 4 divisors (see below), whose sum is σ = 1113753624. Its totient is φ = 1112760000.

The previous prime is 1113256801. The next prime is 1113256813. The reversal of 1113256811 is 1186523111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1186523111 = 367 ⋅3233033.

It is a cyclic number.

It is not a de Polignac number, because 1113256811 - 2¹⁸ = 1112994667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113256813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245030 + ... + 249531.

It is an arithmetic number, because the mean of its divisors is an integer number (278438406).

Almost surely, 2^1113256811 is an apocalyptic number.

1113256811 is a deficient number, since it is larger than the sum of its proper divisors (496813).

1113256811 is an equidigital number, since it uses as much as digits as its factorization.

1113256811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496812.

The product of its digits is 1440, while the sum is 29.

The square root of 1113256811 is about 33365.5033080576. The cubic root of 1113256811 is about 1036.4104587818.

Adding to 1113256811 its reverse (1186523111), we get a palindrome (2299779922).

The spelling of 1113256811 in words is "one billion, one hundred thirteen million, two hundred fifty-six thousand, eight hundred eleven".