2121339049 has 2 divisors, whose sum is σ = 2121339050. Its totient is φ = 2121339048.

The previous prime is 2121339029. The next prime is 2121339061. The reversal of 2121339049 is 9409331212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1869005824 + 252333225 = 43232^2 + 15885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121339049 - 2⁹ = 2121338537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121339029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060669524 + 1060669525.

It is an arithmetic number, because the mean of its divisors is an integer number (1060669525).

Almost surely, 2^2121339049 is an apocalyptic number.

It is an amenable number.

2121339049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121339049 is an equidigital number, since it uses as much as digits as its factorization.

2121339049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 2121339049 is about 46057.9965803985. The cubic root of 2121339049 is about 1284.9020700854.

The spelling of 2121339049 in words is "two billion, one hundred twenty-one million, three hundred thirty-nine thousand, forty-nine".