2211131321 has 10 divisors (see below), whose sum is σ = 2579502522. Its totient is φ = 1895253360.

The previous prime is 2211131261. The next prime is 2211131347. The reversal of 2211131321 is 1231311122.

It can be written as a sum of positive squares in only one way, i.e., 1314787600 + 896343721 = 36260^2 + 29939^2 .

It is not a de Polignac number, because 2211131321 - 2⁶ = 2211131257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211131321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211131621) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 458060 + ... + 462861.

Almost surely, 2^2211131321 is an apocalyptic number.

It is an amenable number.

2211131321 is a deficient number, since it is larger than the sum of its proper divisors (368371201).

2211131321 is an frugal number, since it uses more digits than its factorization.

2211131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920949 (or 920928 counting only the distinct ones).

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

The square root of 2211131321 is about 47022.6681612177. The cubic root of 2211131321 is about 1302.7812881237.

Adding to 2211131321 its reverse (1231311122), we get a palindrome (3442442443).

The spelling of 2211131321 in words is "two billion, two hundred eleven million, one hundred thirty-one thousand, three hundred twenty-one".