11231201311 has 8 divisors (see below), whose sum is σ = 12255684048. Its totient is φ = 10207296000.

The previous prime is 11231201309. The next prime is 11231201341. The reversal of 11231201311 is 11310213211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11231201311 - 2¹ = 11231201309 is a prime.

It is a super-2 number, since 2×11231201311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231201341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103170 + ... + 181951.

It is an arithmetic number, because the mean of its divisors is an integer number (1531960506).

Almost surely, 2^11231201311 is an apocalyptic number.

11231201311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11231201311 is a deficient number, since it is larger than the sum of its proper divisors (1024482737).

11231201311 is a wasteful number, since it uses less digits than its factorization.

11231201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288713.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11231201311 its reverse (11310213211), we get a palindrome (22541414522).

The spelling of 11231201311 in words is "eleven billion, two hundred thirty-one million, two hundred one thousand, three hundred eleven".