30721052771 has 2 divisors, whose sum is σ = 30721052772. Its totient is φ = 30721052770.

The previous prime is 30721052759. The next prime is 30721052773. The reversal of 30721052771 is 17725012703.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30721052771 is a prime.

Together with 30721052773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30721052773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15360526385 + 15360526386.

It is an arithmetic number, because the mean of its divisors is an integer number (15360526386).

Almost surely, 2^30721052771 is an apocalyptic number.

30721052771 is a deficient number, since it is larger than the sum of its proper divisors (1).

30721052771 is an equidigital number, since it uses as much as digits as its factorization.

30721052771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20580, while the sum is 35.

The spelling of 30721052771 in words is "thirty billion, seven hundred twenty-one million, fifty-two thousand, seven hundred seventy-one".