2721212171 has 2 divisors, whose sum is σ = 2721212172. Its totient is φ = 2721212170.

The previous prime is 2721212159. The next prime is 2721212177. The reversal of 2721212171 is 1712121272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2721212171 - 2¹⁰ = 2721211147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2721212171.

It is not a weakly prime, because it can be changed into another prime (2721212177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360606085 + 1360606086.

It is an arithmetic number, because the mean of its divisors is an integer number (1360606086).

Almost surely, 2^2721212171 is an apocalyptic number.

2721212171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721212171 is an equidigital number, since it uses as much as digits as its factorization.

2721212171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 784, while the sum is 26.

The square root of 2721212171 is about 52165.2391061327. The cubic root of 2721212171 is about 1396.1137409960.

The spelling of 2721212171 in words is "two billion, seven hundred twenty-one million, two hundred twelve thousand, one hundred seventy-one".