2121285349 has 2 divisors, whose sum is σ = 2121285350. Its totient is φ = 2121285348.

The previous prime is 2121285307. The next prime is 2121285367. The reversal of 2121285349 is 9435821212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2117656324 + 3629025 = 46018^2 + 1905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121285349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121255349) 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, 1060642674 + 1060642675.

It is an arithmetic number, because the mean of its divisors is an integer number (1060642675).

Almost surely, 2^2121285349 is an apocalyptic number.

It is an amenable number.

2121285349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121285349 is an equidigital number, since it uses as much as digits as its factorization.

2121285349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 2121285349 is about 46057.4136160510. The cubic root of 2121285349 is about 1284.8912279048.

The spelling of 2121285349 in words is "two billion, one hundred twenty-one million, two hundred eighty-five thousand, three hundred forty-nine".