30021102121 has 4 divisors (see below), whose sum is σ = 30051643392. Its totient is φ = 29990560852.

The previous prime is 30021102109. The next prime is 30021102157. The reversal of 30021102121 is 12120112003.

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 30021102121 - 2⁹ = 30021101609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30021102191) 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, 15269161 + ... + 15271126.

It is an arithmetic number, because the mean of its divisors is an integer number (7512910848).

Almost surely, 2^30021102121 is an apocalyptic number.

It is an amenable number.

30021102121 is a deficient number, since it is larger than the sum of its proper divisors (30541271).

30021102121 is an equidigital number, since it uses as much as digits as its factorization.

30021102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30541270.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 30021102121 its reverse (12120112003), we get a palindrome (42141214124).

The spelling of 30021102121 in words is "thirty billion, twenty-one million, one hundred two thousand, one hundred twenty-one".