1231132211 has 2 divisors, whose sum is σ = 1231132212. Its totient is φ = 1231132210.

The previous prime is 1231132207. The next prime is 1231132223. The reversal of 1231132211 is 1122311321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231132211 - 2² = 1231132207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231132211.

It is not a weakly prime, because it can be changed into another prime (1231132271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615566105 + 615566106.

It is an arithmetic number, because the mean of its divisors is an integer number (615566106).

Almost surely, 2^1231132211 is an apocalyptic number.

1231132211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231132211 is an equidigital number, since it uses as much as digits as its factorization.

1231132211 is an evil number, because the sum of its binary digits is even.

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

The square root of 1231132211 is about 35087.4936551473. The cubic root of 1231132211 is about 1071.7699216052.

Adding to 1231132211 its reverse (1122311321), we get a palindrome (2353443532).

The spelling of 1231132211 in words is "one billion, two hundred thirty-one million, one hundred thirty-two thousand, two hundred eleven".