2121349771 has 2 divisors, whose sum is σ = 2121349772. Its totient is φ = 2121349770.

The previous prime is 2121349759. The next prime is 2121349819. The reversal of 2121349771 is 1779431212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121349771 - 2¹⁷ = 2121218699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121349771.

It is not a weakly prime, because it can be changed into another prime (2121343771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060674885 + 1060674886.

It is an arithmetic number, because the mean of its divisors is an integer number (1060674886).

Almost surely, 2^2121349771 is an apocalyptic number.

2121349771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121349771 is an equidigital number, since it uses as much as digits as its factorization.

2121349771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2121349771 is about 46058.1129769772. The cubic root of 2121349771 is about 1284.9042348654.

The spelling of 2121349771 in words is "two billion, one hundred twenty-one million, three hundred forty-nine thousand, seven hundred seventy-one".