30120111123 has 4 divisors (see below), whose sum is σ = 40160148168. Its totient is φ = 20080074080.

The previous prime is 30120111121. The next prime is 30120111157. The reversal of 30120111123 is 32111102103.

It is a happy number.

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 30120111123 - 2¹ = 30120111121 is a prime.

It is a super-2 number, since 2×30120111123² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30120111121) 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, 5020018518 + ... + 5020018523.

It is an arithmetic number, because the mean of its divisors is an integer number (10040037042).

Almost surely, 2^30120111123 is an apocalyptic number.

30120111123 is a deficient number, since it is larger than the sum of its proper divisors (10040037045).

30120111123 is a wasteful number, since it uses less digits than its factorization.

30120111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040037044.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 30120111123 its reverse (32111102103), we get a palindrome (62231213226).

The spelling of 30120111123 in words is "thirty billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty-three".