30002021121 has 4 divisors (see below), whose sum is σ = 40002694832. Its totient is φ = 20001347412.

The previous prime is 30002021089. The next prime is 30002021167. The reversal of 30002021121 is 12112020003.

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 not a de Polignac number, because 30002021121 - 2⁵ = 30002021089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30002021097 and 30002021106.

It is not an unprimeable number, because it can be changed into a prime (30002021171) 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, 5000336851 + ... + 5000336856.

It is an arithmetic number, because the mean of its divisors is an integer number (10000673708).

Almost surely, 2^30002021121 is an apocalyptic number.

It is an amenable number.

30002021121 is a deficient number, since it is larger than the sum of its proper divisors (10000673711).

30002021121 is a wasteful number, since it uses less digits than its factorization.

30002021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000673710.

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

Adding to 30002021121 its reverse (12112020003), we get a palindrome (42114041124).

The spelling of 30002021121 in words is "thirty billion, two million, twenty-one thousand, one hundred twenty-one".