30120023121 has 4 divisors (see below), whose sum is σ = 40160030832. Its totient is φ = 20080015412.

The previous prime is 30120023107. The next prime is 30120023137. The reversal of 30120023121 is 12132002103.

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 30120023121 - 2¹³ = 30120014929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30120023121.

It is not an unprimeable number, because it can be changed into a prime (30124023121) 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, 5020003851 + ... + 5020003856.

It is an arithmetic number, because the mean of its divisors is an integer number (10040007708).

Almost surely, 2^30120023121 is an apocalyptic number.

It is an amenable number.

30120023121 is a deficient number, since it is larger than the sum of its proper divisors (10040007711).

30120023121 is a wasteful number, since it uses less digits than its factorization.

30120023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10040007710.

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

Adding to 30120023121 its reverse (12132002103), we get a palindrome (42252025224).

The spelling of 30120023121 in words is "thirty billion, one hundred twenty million, twenty-three thousand, one hundred twenty-one".