11031322221 has 6 divisors (see below), whose sum is σ = 15934132110. Its totient is φ = 7354214808.

The previous prime is 11031322213. The next prime is 11031322223. The reversal of 11031322221 is 12222313011.

11031322221 is a `hidden beast` number, since 110 + 313 + 22 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10046052900 + 985269321 = 100230^2 + 31389^2 .

It is not a de Polignac number, because 11031322221 - 2³ = 11031322213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11031322194 and 11031322203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031322223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 612851226 + ... + 612851243.

It is an arithmetic number, because the mean of its divisors is an integer number (2655688685).

Almost surely, 2^11031322221 is an apocalyptic number.

It is an amenable number.

11031322221 is a deficient number, since it is larger than the sum of its proper divisors (4902809889).

11031322221 is a wasteful number, since it uses less digits than its factorization.

11031322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225702475 (or 1225702472 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11031322221 its reverse (12222313011), we get a palindrome (23253635232).

The spelling of 11031322221 in words is "eleven billion, thirty-one million, three hundred twenty-two thousand, two hundred twenty-one".