30013213021 has 4 divisors (see below), whose sum is σ = 32741686944. Its totient is φ = 27284739100.

The previous prime is 30013212997. The next prime is 30013213037. The reversal of 30013213021 is 12031231003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30013213021 - 2¹¹ = 30013210973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30013212986 and 30013213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30013213121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364236945 + ... + 1364236966.

It is an arithmetic number, because the mean of its divisors is an integer number (8185421736).

Almost surely, 2^30013213021 is an apocalyptic number.

It is an amenable number.

30013213021 is a deficient number, since it is larger than the sum of its proper divisors (2728473923).

30013213021 is a wasteful number, since it uses less digits than its factorization.

30013213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728473922.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30013213021 its reverse (12031231003), we get a palindrome (42044444024).

The spelling of 30013213021 in words is "thirty billion, thirteen million, two hundred thirteen thousand, twenty-one".