11211321320 has 32 divisors (see below), whose sum is σ = 25366413600. Its totient is φ = 4459472448.

The previous prime is 11211321269. The next prime is 11211321353. The reversal of 11211321320 is 2312311211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775754 + ... + 790073.

It is an arithmetic number, because the mean of its divisors is an integer number (792700425).

Almost surely, 2^11211321320 is an apocalyptic number.

11211321320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211321320 is an abundant number, since it is smaller than the sum of its proper divisors (14155092280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11211321320 is a wasteful number, since it uses less digits than its factorization.

11211321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566017 (or 1566013 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11211321320 its reverse (2312311211), we get a palindrome (13523632531).

The spelling of 11211321320 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, three hundred twenty".