11031322121221 has 4 divisors (see below), whose sum is σ = 11031792623712. Its totient is φ = 11030851618732.

The previous prime is 11031322121213. The next prime is 11031322121231. The reversal of 11031322121221 is 12212122313011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11031322121221 - 2³ = 11031322121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11031322121192 and 11031322121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031322121231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235216075 + ... + 235262968.

It is an arithmetic number, because the mean of its divisors is an integer number (2757948155928).

Almost surely, 2^{11031322121221} is an apocalyptic number.

It is an amenable number.

11031322121221 is a deficient number, since it is larger than the sum of its proper divisors (470502491).

11031322121221 is an equidigital number, since it uses as much as digits as its factorization.

11031322121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470502490.

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

Adding to 11031322121221 its reverse (12212122313011), we get a palindrome (23243444434232).

The spelling of 11031322121221 in words is "eleven trillion, thirty-one billion, three hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".