30120121123 has 4 divisors (see below), whose sum is σ = 30127954480. Its totient is φ = 30112287768.

The previous prime is 30120121117. The next prime is 30120121133. The reversal of 30120121123 is 32112102103.

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 30120121123 - 2²⁵ = 30086566691 is a prime.

It is a super-2 number, since 2×30120121123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30120121097 and 30120121106.

It is not an unprimeable number, because it can be changed into a prime (30120121133) 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, 3910908 + ... + 3918601.

It is an arithmetic number, because the mean of its divisors is an integer number (7531988620).

Almost surely, 2^30120121123 is an apocalyptic number.

30120121123 is a deficient number, since it is larger than the sum of its proper divisors (7833357).

30120121123 is an equidigital number, since it uses as much as digits as its factorization.

30120121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7833356.

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

Adding to 30120121123 its reverse (32112102103), we get a palindrome (62232223226).

The spelling of 30120121123 in words is "thirty billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-three".