30123012 has 48 divisors (see below), whose sum is σ = 72055872. Its totient is φ = 9792000.

The previous prime is 30123007. The next prime is 30123019. The reversal of 30123012 is 21032103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (30123019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119887 + ... + 120137.

It is an arithmetic number, because the mean of its divisors is an integer number (1501164).

Almost surely, 2^30123012 is an apocalyptic number.

It is an amenable number.

30123012 is an abundant number, since it is smaller than the sum of its proper divisors (41932860).

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

30123012 is a wasteful number, since it uses less digits than its factorization.

30123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30123012 is about 5488.4434951997. The cubic root of 30123012 is about 311.1473679778.

Adding to 30123012 its reverse (21032103), we get a palindrome (51155115).

Subtracting from 30123012 its reverse (21032103), we obtain a palindrome (9090909).

The spelling of 30123012 in words is "thirty million, one hundred twenty-three thousand, twelve".