30021112123 has 4 divisors (see below), whose sum is σ = 30296535280. Its totient is φ = 29745688968.

The previous prime is 30021112117. The next prime is 30021112139. The reversal of 30021112123 is 32121112003.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30021112123 - 2⁵ = 30021112091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30021112097 and 30021112106.

It is not an unprimeable number, because it can be changed into a prime (30021110123) 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, 137711415 + ... + 137711632.

It is an arithmetic number, because the mean of its divisors is an integer number (7574133820).

Almost surely, 2^30021112123 is an apocalyptic number.

30021112123 is a deficient number, since it is larger than the sum of its proper divisors (275423157).

30021112123 is a wasteful number, since it uses less digits than its factorization.

30021112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275423156.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30021112123 its reverse (32121112003), we get a palindrome (62142224126).

The spelling of 30021112123 in words is "thirty billion, twenty-one million, one hundred twelve thousand, one hundred twenty-three".