1210200149 has 2 divisors, whose sum is σ = 1210200150. Its totient is φ = 1210200148.

The previous prime is 1210200113. The next prime is 1210200151. The reversal of 1210200149 is 9410020121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634536100 + 575664049 = 25190^2 + 23993^2 .

It is an emirp because it is prime and its reverse (9410020121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210200149 is a prime.

Together with 1210200151, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210200149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210200109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605100074 + 605100075.

It is an arithmetic number, because the mean of its divisors is an integer number (605100075).

Almost surely, 2^1210200149 is an apocalyptic number.

It is an amenable number.

1210200149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210200149 is an equidigital number, since it uses as much as digits as its factorization.

1210200149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1210200149 is about 34787.9310824889. The cubic root of 1210200149 is about 1065.6609881340.

The spelling of 1210200149 in words is "one billion, two hundred ten million, two hundred thousand, one hundred forty-nine".