11111113321 has 16 divisors (see below), whose sum is σ = 13861306368. Its totient is φ = 8652704400.

The previous prime is 11111113319. The next prime is 11111113373. The reversal of 11111113321 is 12331111111.

It is a cyclic number.

It is not a de Polignac number, because 11111113321 - 2¹ = 11111113319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111113295 and 11111113304.

It is not an unprimeable number, because it can be changed into a prime (11111113301) 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, 84666 + ... + 171436.

It is an arithmetic number, because the mean of its divisors is an integer number (866331648).

Almost surely, 2^11111113321 is an apocalyptic number.

11111113321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111113321 is a deficient number, since it is larger than the sum of its proper divisors (2750193047).

11111113321 is a wasteful number, since it uses less digits than its factorization.

11111113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88452.

The product of its digits is 18, while the sum is 16.

Adding to 11111113321 its reverse (12331111111), we get a palindrome (23442224432).

The spelling of 11111113321 in words is "eleven billion, one hundred eleven million, one hundred thirteen thousand, three hundred twenty-one".