30717113777221 has 2 divisors, whose sum is σ = 30717113777222. Its totient is φ = 30717113777220.

The previous prime is 30717113777183. The next prime is 30717113777227. The reversal of 30717113777221 is 12277731171703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30256325330625 + 460788446596 = 5500575^2 + 678814^2 .

It is a cyclic number.

It is not a de Polignac number, because 30717113777221 - 2⁷ = 30717113777093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30717113777227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15358556888610 + 15358556888611.

It is an arithmetic number, because the mean of its divisors is an integer number (15358556888611).

Almost surely, 2^{30717113777221} is an apocalyptic number.

It is an amenable number.

30717113777221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30717113777221 is an equidigital number, since it uses as much as digits as its factorization.

30717113777221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 605052, while the sum is 49.

The spelling of 30717113777221 in words is "thirty trillion, seven hundred seventeen billion, one hundred thirteen million, seven hundred seventy-seven thousand, two hundred twenty-one".