11211213321 has 160 divisors (see below), whose sum is σ = 22246963200. Its totient is φ = 5450353920.

The previous prime is 11211213317. The next prime is 11211213341. The reversal of 11211213321 is 12331211211.

It is not a de Polignac number, because 11211213321 - 2² = 11211213317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211213294 and 11211213303.

It is not an unprimeable number, because it can be changed into a prime (11211213341) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 10546236 + ... + 10547298.

It is an arithmetic number, because the mean of its divisors is an integer number (139043520).

Almost surely, 2^11211213321 is an apocalyptic number.

11211213321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211213321 is a deficient number, since it is larger than the sum of its proper divisors (11035749879).

11211213321 is a wasteful number, since it uses less digits than its factorization.

11211213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1192 counting only the distinct ones).

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

Adding to 11211213321 its reverse (12331211211), we get a palindrome (23542424532).

The spelling of 11211213321 in words is "eleven billion, two hundred eleven million, two hundred thirteen thousand, three hundred twenty-one".