30212130021 has 4 divisors (see below), whose sum is σ = 40282840032. Its totient is φ = 20141420012.

The previous prime is 30212129953. The next prime is 30212130041. The reversal of 30212130021 is 12003121203.

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 30212130021 - 2²⁶ = 30145021157 is a prime.

It is a super-4 number, since 4×30212130021⁴ (a number of 43 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30212130041) 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, 5035355001 + ... + 5035355006.

It is an arithmetic number, because the mean of its divisors is an integer number (10070710008).

Almost surely, 2^30212130021 is an apocalyptic number.

It is an amenable number.

30212130021 is a deficient number, since it is larger than the sum of its proper divisors (10070710011).

30212130021 is a wasteful number, since it uses less digits than its factorization.

30212130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10070710010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30212130021 its reverse (12003121203), we get a palindrome (42215251224).

The spelling of 30212130021 in words is "thirty billion, two hundred twelve million, one hundred thirty thousand, twenty-one".