30001001220 has 36 divisors (see below), whose sum is σ = 91003037580. Its totient is φ = 8000266944.

The previous prime is 30001001203. The next prime is 30001001221. The reversal of 30001001220 is 2210010003.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5821995204 + 24179006016 = 76302^2 + 155496^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (30001001221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83335935 + ... + 83336294.

It is an arithmetic number, because the mean of its divisors is an integer number (2527862155).

Almost surely, 2^30001001220 is an apocalyptic number.

30001001220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30001001220 is an abundant number, since it is smaller than the sum of its proper divisors (61002036360).

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

30001001220 is a wasteful number, since it uses less digits than its factorization.

30001001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166672244 (or 166672239 counting only the distinct ones).

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

Adding to 30001001220 its reverse (2210010003), we get a palindrome (32211011223).

The spelling of 30001001220 in words is "thirty billion, one million, one thousand, two hundred twenty".