30307541221 has 4 divisors (see below), whose sum is σ = 30307902700. Its totient is φ = 30307179744.

The previous prime is 30307541203. The next prime is 30307541281. The reversal of 30307541221 is 12214570303.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12214570303 = 13 ⋅939582331.

It can be written as a sum of positive squares in 2 ways, for example, as 14247048321 + 16060492900 = 119361^2 + 126730^2 .

It is a cyclic number.

It is not a de Polignac number, because 30307541221 - 2¹³ = 30307533029 is a prime.

It is a super-2 number, since 2×30307541221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30307541221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30307541281) 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, 17515 + ... + 246823.

It is an arithmetic number, because the mean of its divisors is an integer number (7576975675).

Almost surely, 2^30307541221 is an apocalyptic number.

It is an amenable number.

30307541221 is a deficient number, since it is larger than the sum of its proper divisors (361479).

30307541221 is a wasteful number, since it uses less digits than its factorization.

30307541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361478.

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 30307541221 in words is "thirty billion, three hundred seven million, five hundred forty-one thousand, two hundred twenty-one".