30771000221 has 4 divisors (see below), whose sum is σ = 33138000252. Its totient is φ = 28404000192.

The previous prime is 30771000181. The next prime is 30771000277. The reversal of 30771000221 is 12200017703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8484988996 + 22286011225 = 92114^2 + 149285^2 .

It is a cyclic number.

It is not a de Polignac number, because 30771000221 - 2¹⁸ = 30770738077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30771000121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183499996 + ... + 1183500021.

It is an arithmetic number, because the mean of its divisors is an integer number (8284500063).

Almost surely, 2^30771000221 is an apocalyptic number.

It is an amenable number.

30771000221 is a deficient number, since it is larger than the sum of its proper divisors (2367000031).

30771000221 is a wasteful number, since it uses less digits than its factorization.

30771000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367000030.

The product of its (nonzero) digits is 588, while the sum is 23.

Adding to 30771000221 its reverse (12200017703), we get a palindrome (42971017924).

The spelling of 30771000221 in words is "thirty billion, seven hundred seventy-one million, two hundred twenty-one", and thus it is an aban number.