1101312011 has 4 divisors (see below), whose sum is σ = 1101654024. Its totient is φ = 1100970000.

The previous prime is 1101311941. The next prime is 1101312019. The reversal of 1101312011 is 1102131011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102131011 = 439 ⋅2510549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101312011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101311983 and 1101312001.

It is not an unprimeable number, because it can be changed into a prime (1101312019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166130 + ... + 172631.

It is an arithmetic number, because the mean of its divisors is an integer number (275413506).

Almost surely, 2^1101312011 is an apocalyptic number.

1101312011 is a deficient number, since it is larger than the sum of its proper divisors (342013).

1101312011 is an equidigital number, since it uses as much as digits as its factorization.

1101312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342012.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1101312011 is about 33186.0213192242. The cubic root of 1101312011 is about 1032.6903653826.

Adding to 1101312011 its reverse (1102131011), we get a palindrome (2203443022).

The spelling of 1101312011 in words is "one billion, one hundred one million, three hundred twelve thousand, eleven".