1331231211 has 12 divisors (see below), whose sum is σ = 1928133792. Its totient is φ = 885067056.

The previous prime is 1331231197. The next prime is 1331231261. The reversal of 1331231211 is 1121321331.

It is not a de Polignac number, because 1331231211 - 2¹⁷ = 1331100139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331231261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198216 + ... + 204821.

It is an arithmetic number, because the mean of its divisors is an integer number (160677816).

Almost surely, 2^1331231211 is an apocalyptic number.

1331231211 is a deficient number, since it is larger than the sum of its proper divisors (596902581).

1331231211 is a wasteful number, since it uses less digits than its factorization.

1331231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403410 (or 403407 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1331231211 is about 36486.0413171942. The cubic root of 1331231211 is about 1100.0636908025.

Adding to 1331231211 its reverse (1121321331), we get a palindrome (2452552542).

The spelling of 1331231211 in words is "one billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred eleven".