1111001311 has 4 divisors (see below), whose sum is σ = 1269715792. Its totient is φ = 952286832.

The previous prime is 1111001293. The next prime is 1111001321. The reversal of 1111001311 is 1131001111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1131001111 = 701 ⋅1613411.

It is not a de Polignac number, because 1111001311 - 2²⁹ = 574130399 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 (1111001321) 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, 79357230 + ... + 79357243.

It is an arithmetic number, because the mean of its divisors is an integer number (317428948).

Almost surely, 2^1111001311 is an apocalyptic number.

1111001311 is a deficient number, since it is larger than the sum of its proper divisors (158714481).

1111001311 is an equidigital number, since it uses as much as digits as its factorization.

1111001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158714480.

The product of its (nonzero) digits is 3, while the sum is 10.

The square root of 1111001311 is about 33331.6862909754. The cubic root of 1111001311 is about 1035.7100500800.

Adding to 1111001311 its reverse (1131001111), we get a palindrome (2242002422).

The spelling of 1111001311 in words is "one billion, one hundred eleven million, one thousand, three hundred eleven".