11212113321 has 12 divisors (see below), whose sum is σ = 16469771760. Its totient is φ = 7348051320.

The previous prime is 11212113317. The next prime is 11212113337. The reversal of 11212113321 is 12331121211.

11212113321 is a `hidden beast` number, since 1 + 121 + 211 + 332 + 1 = 666.

It is not a de Polignac number, because 11212113321 - 2² = 11212113317 is a prime.

It is a super-2 number, since 2×11212113321² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11212113294 and 11212113303.

It is not an unprimeable number, because it can be changed into a prime (11212113361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10557015 + ... + 10558076.

It is an arithmetic number, because the mean of its divisors is an integer number (1372480980).

Almost surely, 2^11212113321 is an apocalyptic number.

It is an amenable number.

11212113321 is a deficient number, since it is larger than the sum of its proper divisors (5257658439).

11212113321 is a wasteful number, since it uses less digits than its factorization.

11212113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21115156 (or 21115153 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11212113321 its reverse (12331121211), we get a palindrome (23543234532).

The spelling of 11212113321 in words is "eleven billion, two hundred twelve million, one hundred thirteen thousand, three hundred twenty-one".