30001000221 has 24 divisors (see below), whose sum is σ = 45061431480. Its totient is φ = 19210899456.

The previous prime is 30001000219. The next prime is 30001000243. The reversal of 30001000221 is 12200010003.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7419927321 + 22581072900 = 86139^2 + 150270^2 .

It is not a de Polignac number, because 30001000221 - 2¹ = 30001000219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30001000261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247416 + ... + 348161.

It is an arithmetic number, because the mean of its divisors is an integer number (1877559645).

Almost surely, 2^30001000221 is an apocalyptic number.

It is an amenable number.

30001000221 is a deficient number, since it is larger than the sum of its proper divisors (15060431259).

30001000221 is a wasteful number, since it uses less digits than its factorization.

30001000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595805 (or 595802 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 30001000221 its reverse (12200010003), we get a palindrome (42201010224).

The spelling of 30001000221 in words is "thirty billion, one million, two hundred twenty-one", and thus it is an aban number.