1232131211 has 2 divisors, whose sum is σ = 1232131212. Its totient is φ = 1232131210.

The previous prime is 1232131189. The next prime is 1232131297. The reversal of 1232131211 is 1121312321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1232131211 - 2²² = 1227936907 is a prime.

It is a super-2 number, since 2×1232131211² = 3036294642240653042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1232131211.

It is not a weakly prime, because it can be changed into another prime (1232131811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616065605 + 616065606.

It is an arithmetic number, because the mean of its divisors is an integer number (616065606).

Almost surely, 2^1232131211 is an apocalyptic number.

1232131211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232131211 is an equidigital number, since it uses as much as digits as its factorization.

1232131211 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 1232131211 is about 35101.7266099547. The cubic root of 1232131211 is about 1072.0597384819.

Adding to 1232131211 its reverse (1121312321), we get a palindrome (2353443532).

The spelling of 1232131211 in words is "one billion, two hundred thirty-two million, one hundred thirty-one thousand, two hundred eleven".