2231212311 has 80 divisors (see below), whose sum is σ = 3636249408. Its totient is φ = 1358208000.

The previous prime is 2231212301. The next prime is 2231212339. The reversal of 2231212311 is 1132121322.

It is not a de Polignac number, because 2231212311 - 2¹⁸ = 2230950167 is a prime.

It is a super-3 number, since 3×2231212311³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231212301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8483566 + ... + 8483828.

Almost surely, 2^2231212311 is an apocalyptic number.

2231212311 is a deficient number, since it is larger than the sum of its proper divisors (1405037097).

2231212311 is a wasteful number, since it uses less digits than its factorization.

2231212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 445 counting only the distinct ones).

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

The square root of 2231212311 is about 47235.7101248621. The cubic root of 2231212311 is about 1306.7132630443.

Adding to 2231212311 its reverse (1132121322), we get a palindrome (3363333633).

The spelling of 2231212311 in words is "two billion, two hundred thirty-one million, two hundred twelve thousand, three hundred eleven".