11312321133 has 16 divisors (see below), whose sum is σ = 15495883200. Its totient is φ = 7335288576.

The previous prime is 11312321123. The next prime is 11312321143. The reversal of 11312321133 is 33112321311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11312321123) and next prime (11312321143).

It is not a de Polignac number, because 11312321133 - 2²² = 11308126829 is a prime.

It is a super-2 number, since 2×11312321133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312321123) 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, 356293 + ... + 386741.

It is an arithmetic number, because the mean of its divisors is an integer number (968492700).

Almost surely, 2^11312321133 is an apocalyptic number.

It is an amenable number.

11312321133 is a deficient number, since it is larger than the sum of its proper divisors (4183562067).

11312321133 is a wasteful number, since it uses less digits than its factorization.

11312321133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33836.

The product of its digits is 324, while the sum is 21.

Adding to 11312321133 its reverse (33112321311), we get a palindrome (44424642444).

The spelling of 11312321133 in words is "eleven billion, three hundred twelve million, three hundred twenty-one thousand, one hundred thirty-three".