30010011221 has 4 divisors (see below), whose sum is σ = 30010928844. Its totient is φ = 30009093600.

The previous prime is 30010011211. The next prime is 30010011247. The reversal of 30010011221 is 12211001003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12211001003 = 26107 ⋅467729.

It can be written as a sum of positive squares in 2 ways, for example, as 14188144996 + 15821866225 = 119114^2 + 125785^2 .

It is a cyclic number.

It is not a de Polignac number, because 30010011221 - 2¹⁰ = 30010010197 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 (30010011211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407870 + ... + 475791.

It is an arithmetic number, because the mean of its divisors is an integer number (7502732211).

Almost surely, 2^30010011221 is an apocalyptic number.

It is an amenable number.

30010011221 is a deficient number, since it is larger than the sum of its proper divisors (917623).

30010011221 is an equidigital number, since it uses as much as digits as its factorization.

30010011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917622.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 30010011221 its reverse (12211001003), we get a palindrome (42221012224).

The spelling of 30010011221 in words is "thirty billion, ten million, eleven thousand, two hundred twenty-one".