2121003149 has 2 divisors, whose sum is σ = 2121003150. Its totient is φ = 2121003148.

The previous prime is 2121003097. The next prime is 2121003173. The reversal of 2121003149 is 9413001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067975625 + 53027524 = 45475^2 + 7282^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121003149 - 2¹² = 2120999053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121000149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060501574 + 1060501575.

It is an arithmetic number, because the mean of its divisors is an integer number (1060501575).

Almost surely, 2^2121003149 is an apocalyptic number.

It is an amenable number.

2121003149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121003149 is an equidigital number, since it uses as much as digits as its factorization.

2121003149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2121003149 is about 46054.3499465577. The cubic root of 2121003149 is about 1284.8342479257.

The spelling of 2121003149 in words is "two billion, one hundred twenty-one million, three thousand, one hundred forty-nine".