11312032211221 has 16 divisors (see below), whose sum is σ = 13646766528000. Its totient is φ = 9361681821744.

The previous prime is 11312032211213. The next prime is 11312032211261. The reversal of 11312032211221 is 12211223021311.

It is a happy number.

It is not a de Polignac number, because 11312032211221 - 2³ = 11312032211213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11312032211192 and 11312032211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312032211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568605325 + ... + 568625218.

It is an arithmetic number, because the mean of its divisors is an integer number (852922908000).

Almost surely, 2^{11312032211221} is an apocalyptic number.

It is an amenable number.

11312032211221 is a deficient number, since it is larger than the sum of its proper divisors (2334734316779).

11312032211221 is an equidigital number, since it uses as much as digits as its factorization.

11312032211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137230593 (or 1137230579 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11312032211221 its reverse (12211223021311), we get a palindrome (23523255232532).

The spelling of 11312032211221 in words is "eleven trillion, three hundred twelve billion, thirty-two million, two hundred eleven thousand, two hundred twenty-one".