30123002120 has 32 divisors (see below), whose sum is σ = 68376559320. Its totient is φ = 11942568960.

The previous prime is 30123002099. The next prime is 30123002137. The reversal of 30123002120 is 2120032103.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18054221956 + 12068780164 = 134366^2 + 109858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30123002095 and 30123002104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3327671 + ... + 3336710.

Almost surely, 2^30123002120 is an apocalyptic number.

It is an amenable number.

30123002120 is an abundant number, since it is smaller than the sum of its proper divisors (38253557200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30123002120 is a wasteful number, since it uses less digits than its factorization.

30123002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664505 (or 6664501 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30123002120 its reverse (2120032103), we get a palindrome (32243034223).

The spelling of 30123002120 in words is "thirty billion, one hundred twenty-three million, two thousand, one hundred twenty".