11312011311 has 16 divisors (see below), whose sum is σ = 15190156800. Its totient is φ = 7487645600.

The previous prime is 11312011283. The next prime is 11312011351. The reversal of 11312011311 is 11311021311.

It is a cyclic number.

It is not a de Polignac number, because 11312011311 - 2¹⁵ = 11311978543 is a prime.

It is a super-3 number, since 3×11312011311³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312011351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1723486 + ... + 1730036.

It is an arithmetic number, because the mean of its divisors is an integer number (949384800).

Almost surely, 2^11312011311 is an apocalyptic number.

11312011311 is a deficient number, since it is larger than the sum of its proper divisors (3878145489).

11312011311 is a wasteful number, since it uses less digits than its factorization.

11312011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11312011311 its reverse (11311021311), we get a palindrome (22623032622).

The spelling of 11312011311 in words is "eleven billion, three hundred twelve million, eleven thousand, three hundred eleven".