210102149 has 2 divisors, whose sum is σ = 210102150. Its totient is φ = 210102148.

The previous prime is 210102121. The next prime is 210102157. The reversal of 210102149 is 941201012.

210102149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148401124 + 61701025 = 12182^2 + 7855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210102149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210102149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210102049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051074 + 105051075.

It is an arithmetic number, because the mean of its divisors is an integer number (105051075).

Almost surely, 2^210102149 is an apocalyptic number.

It is an amenable number.

210102149 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102149 is an equidigital number, since it uses as much as digits as its factorization.

210102149 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 210102149 is about 14494.9007930375. The cubic root of 210102149 is about 594.4885551594.

The spelling of 210102149 in words is "two hundred ten million, one hundred two thousand, one hundred forty-nine".