30001212021 has 48 divisors (see below), whose sum is σ = 47067955200. Its totient is φ = 16933387680.

The previous prime is 30001212019. The next prime is 30001212041. The reversal of 30001212021 is 12021210003.

It is not a de Polignac number, because 30001212021 - 2¹ = 30001212019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30001211988 and 30001212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30001212001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370060 + ... + 443786.

It is an arithmetic number, because the mean of its divisors is an integer number (980582400).

Almost surely, 2^30001212021 is an apocalyptic number.

It is an amenable number.

30001212021 is a deficient number, since it is larger than the sum of its proper divisors (17066743179).

30001212021 is a wasteful number, since it uses less digits than its factorization.

30001212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73830 (or 73819 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 30001212021 its reverse (12021210003), we get a palindrome (42022422024).

The spelling of 30001212021 in words is "thirty billion, one million, two hundred twelve thousand, twenty-one".