30001143221 has 6 divisors (see below), whose sum is σ = 34899289110. Its totient is φ = 25715265576.

The previous prime is 30001143209. The next prime is 30001143287. The reversal of 30001143221 is 12234110003.

It can be written as a sum of positive squares in only one way, i.e., 27701940721 + 2299202500 = 166439^2 + 47950^2 .

It is not a de Polignac number, because 30001143221 - 2⁶ = 30001143157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30001143221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30001146221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306134066 + ... + 306134163.

It is an arithmetic number, because the mean of its divisors is an integer number (5816548185).

Almost surely, 2^30001143221 is an apocalyptic number.

It is an amenable number.

30001143221 is a deficient number, since it is larger than the sum of its proper divisors (4898145889).

30001143221 is an equidigital number, since it uses as much as digits as its factorization.

30001143221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612268243 (or 612268236 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30001143221 its reverse (12234110003), we get a palindrome (42235253224).

The spelling of 30001143221 in words is "thirty billion, one million, one hundred forty-three thousand, two hundred twenty-one".