30013121221 has 8 divisors (see below), whose sum is σ = 31636230080. Its totient is φ = 28394359488.

The previous prime is 30013121219. The next prime is 30013121249. The reversal of 30013121221 is 12212131003.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30013121221 - 2¹ = 30013121219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30013121195 and 30013121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30013121251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072596 + ... + 1100221.

It is an arithmetic number, because the mean of its divisors is an integer number (3954528760).

Almost surely, 2^30013121221 is an apocalyptic number.

It is an amenable number.

30013121221 is a deficient number, since it is larger than the sum of its proper divisors (1623108859).

30013121221 is a wasteful number, since it uses less digits than its factorization.

30013121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173563.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30013121221 its reverse (12212131003), we get a palindrome (42225252224).

The spelling of 30013121221 in words is "thirty billion, thirteen million, one hundred twenty-one thousand, two hundred twenty-one".