30055020123 has 4 divisors (see below), whose sum is σ = 40073360168. Its totient is φ = 20036680080.

The previous prime is 30055020101. The next prime is 30055020131. The reversal of 30055020123 is 32102055003.

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

It is not a de Polignac number, because 30055020123 - 2¹⁸ = 30054757979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30055020123.

It is not an unprimeable number, because it can be changed into a prime (30055020623) 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, 5009170018 + ... + 5009170023.

It is an arithmetic number, because the mean of its divisors is an integer number (10018340042).

Almost surely, 2^30055020123 is an apocalyptic number.

30055020123 is a deficient number, since it is larger than the sum of its proper divisors (10018340045).

30055020123 is a wasteful number, since it uses less digits than its factorization.

30055020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018340044.

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 30055020123 its reverse (32102055003), we get a palindrome (62157075126).

The spelling of 30055020123 in words is "thirty billion, fifty-five million, twenty thousand, one hundred twenty-three".