11311210031111 has 8 divisors (see below), whose sum is σ = 11326850169600. Its totient is φ = 11295579350880.

The previous prime is 11311210030987. The next prime is 11311210031179. The reversal of 11311210031111 is 11113001211311.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311210031111 is a prime.

It is a super-2 number, since 2×11311210031111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11311210031111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311216031111) 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, 30581 + ... + 4756401.

It is an arithmetic number, because the mean of its divisors is an integer number (1415856271200).

Almost surely, 2^{11311210031111} is an apocalyptic number.

11311210031111 is a deficient number, since it is larger than the sum of its proper divisors (15640138489).

11311210031111 is a wasteful number, since it uses less digits than its factorization.

11311210031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729129.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 11311210031111 its reverse (11113001211311), we get a palindrome (22424211242422).

The spelling of 11311210031111 in words is "eleven trillion, three hundred eleven billion, two hundred ten million, thirty-one thousand, one hundred eleven".