1232211191 has 2 divisors, whose sum is σ = 1232211192. Its totient is φ = 1232211190.

The previous prime is 1232211109. The next prime is 1232211193. The reversal of 1232211191 is 1911122321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232211191 is a prime.

Together with 1232211193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232211193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616105595 + 616105596.

It is an arithmetic number, because the mean of its divisors is an integer number (616105596).

Almost surely, 2^1232211191 is an apocalyptic number.

1232211191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232211191 is an equidigital number, since it uses as much as digits as its factorization.

1232211191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 23.

The square root of 1232211191 is about 35102.8658516652. The cubic root of 1232211191 is about 1072.0829344646.

The spelling of 1232211191 in words is "one billion, two hundred thirty-two million, two hundred eleven thousand, one hundred ninety-one".