11201311031 has 4 divisors (see below), whose sum is σ = 11203087200. Its totient is φ = 11199534864.

The previous prime is 11201311019. The next prime is 11201311087. The reversal of 11201311031 is 13011310211.

It is a happy number.

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 11201311031 - 2¹⁰ = 11201310007 is a prime.

It is a super-2 number, since 2×11201311031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201310997 and 11201311015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201311931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878591 + ... + 891248.

It is an arithmetic number, because the mean of its divisors is an integer number (2800771800).

Almost surely, 2^11201311031 is an apocalyptic number.

11201311031 is a deficient number, since it is larger than the sum of its proper divisors (1776169).

11201311031 is an equidigital number, since it uses as much as digits as its factorization.

11201311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776168.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11201311031 its reverse (13011310211), we get a palindrome (24212621242).

The spelling of 11201311031 in words is "eleven billion, two hundred one million, three hundred eleven thousand, thirty-one".