30010031221 has 4 divisors (see below), whose sum is σ = 30741983244. Its totient is φ = 29278079200.

The previous prime is 30010031209. The next prime is 30010031239. The reversal of 30010031221 is 12213001003.

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 436350321 + 29573680900 = 20889^2 + 171970^2 .

It is a cyclic number.

It is not a de Polignac number, because 30010031221 - 2¹⁵ = 30009998453 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 (30010031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365975950 + ... + 365976031.

It is an arithmetic number, because the mean of its divisors is an integer number (7685495811).

Almost surely, 2^30010031221 is an apocalyptic number.

It is an amenable number.

30010031221 is a deficient number, since it is larger than the sum of its proper divisors (731952023).

30010031221 is an equidigital number, since it uses as much as digits as its factorization.

30010031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731952022.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30010031221 its reverse (12213001003), we get a palindrome (42223032224).

It can be divided in two parts, 3001003 and 1221, that multiplied together give a palindrome (3664224663).

The spelling of 30010031221 in words is "thirty billion, ten million, thirty-one thousand, two hundred twenty-one".