1210212149 has 2 divisors, whose sum is σ = 1210212150. Its totient is φ = 1210212148.

The previous prime is 1210212109. The next prime is 1210212151. The reversal of 1210212149 is 9412120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005207025 + 205005124 = 31705^2 + 14318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210212149 is a prime.

It is a super-2 number, since 2×1210212149² = 2929226891174396402, which contains 22 as substring.

Together with 1210212151, 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 (1210212109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605106074 + 605106075.

It is an arithmetic number, because the mean of its divisors is an integer number (605106075).

Almost surely, 2^1210212149 is an apocalyptic number.

It is an amenable number.

1210212149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210212149 is an equidigital number, since it uses as much as digits as its factorization.

1210212149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1210212149 is about 34788.1035556697. The cubic root of 1210212149 is about 1065.6645103859.

The spelling of 1210212149 in words is "one billion, two hundred ten million, two hundred twelve thousand, one hundred forty-nine".