30221201220 has 48 divisors (see below), whose sum is σ = 96707845248. Its totient is φ = 6907703040.

The previous prime is 30221201201. The next prime is 30221201239. The reversal of 30221201220 is 2210212203.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30221201201) and next prime (30221201239).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30221201220.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35977201 + ... + 35978040.

It is an arithmetic number, because the mean of its divisors is an integer number (2014746776).

Almost surely, 2^30221201220 is an apocalyptic number.

30221201220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30221201220 is an abundant number, since it is smaller than the sum of its proper divisors (66486644028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30221201220 is a wasteful number, since it uses less digits than its factorization.

30221201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71955260 (or 71955258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 30221201220 its reverse (2210212203), we get a palindrome (32431413423).

The spelling of 30221201220 in words is "thirty billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".