2231211311 has 16 divisors (see below), whose sum is σ = 2577137664. Its totient is φ = 1892165184.

The previous prime is 2231211289. The next prime is 2231211313. The reversal of 2231211311 is 1131121322.

It is not a de Polignac number, because 2231211311 - 2¹⁸ = 2230949167 is a prime.

It is a super-3 number, since 3×2231211311³ (a number of 29 digits) contains 333 as substring.

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 2231211311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231211313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337211 + ... + 343763.

It is an arithmetic number, because the mean of its divisors is an integer number (161071104).

Almost surely, 2^2231211311 is an apocalyptic number.

2231211311 is a deficient number, since it is larger than the sum of its proper divisors (345926353).

2231211311 is a wasteful number, since it uses less digits than its factorization.

2231211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070.

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

The square root of 2231211311 is about 47235.6995396490. The cubic root of 2231211311 is about 1306.7130678270.

Adding to 2231211311 its reverse (1131121322), we get a palindrome (3362332633).

The spelling of 2231211311 in words is "two billion, two hundred thirty-one million, two hundred eleven thousand, three hundred eleven".