2121349939 has 8 divisors (see below), whose sum is σ = 2169049680. Its totient is φ = 2074177536.

The previous prime is 2121349921. The next prime is 2121349987. The reversal of 2121349939 is 9399431212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121349939 - 2⁵ = 2121349907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121349895 and 2121349904.

It is not an unprimeable number, because it can be changed into a prime (2121389939) 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 in 7 ways as a sum of consecutive naturals, for example, 123694 + ... + 139795.

It is an arithmetic number, because the mean of its divisors is an integer number (271131210).

Almost surely, 2^2121349939 is an apocalyptic number.

2121349939 is a deficient number, since it is larger than the sum of its proper divisors (47699741).

2121349939 is an equidigital number, since it uses as much as digits as its factorization.

2121349939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263669.

The product of its digits is 104976, while the sum is 43.

The square root of 2121349939 is about 46058.1148007601. The cubic root of 2121349939 is about 1284.9042687847.

The spelling of 2121349939 in words is "two billion, one hundred twenty-one million, three hundred forty-nine thousand, nine hundred thirty-nine".