201211302989 has 2 divisors, whose sum is σ = 201211302990. Its totient is φ = 201211302988.

The previous prime is 201211302899. The next prime is 201211303031. The reversal of 201211302989 is 989203112102.

Together with previous prime (201211302899) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104904732100 + 96306570889 = 323890^2 + 310333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211302989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211302689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605651494 + 100605651495.

It is an arithmetic number, because the mean of its divisors is an integer number (100605651495).

Almost surely, 2^201211302989 is an apocalyptic number.

It is an amenable number.

201211302989 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211302989 is an equidigital number, since it uses as much as digits as its factorization.

201211302989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 201211302989 in words is "two hundred one billion, two hundred eleven million, three hundred two thousand, nine hundred eighty-nine".