201213433691 has 2 divisors, whose sum is σ = 201213433692. Its totient is φ = 201213433690.

The previous prime is 201213433669. The next prime is 201213433717. The reversal of 201213433691 is 196334312102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201213433691 is a prime.

It is not a weakly prime, because it can be changed into another prime (201213433651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606716845 + 100606716846.

It is an arithmetic number, because the mean of its divisors is an integer number (100606716846).

Almost surely, 2^201213433691 is an apocalyptic number.

201213433691 is a deficient number, since it is larger than the sum of its proper divisors (1).

201213433691 is an equidigital number, since it uses as much as digits as its factorization.

201213433691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 201213433691 its reverse (196334312102), we get a palindrome (397547745793).

The spelling of 201213433691 in words is "two hundred one billion, two hundred thirteen million, four hundred thirty-three thousand, six hundred ninety-one".