30312120112 has 20 divisors (see below), whose sum is σ = 58973432056. Its totient is φ = 15093169920.

The previous prime is 30312120089. The next prime is 30312120119. The reversal of 30312120112 is 21102121303.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (30312120119) 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, 3926658 + ... + 3934369.

Almost surely, 2^30312120112 is an apocalyptic number.

It is an amenable number.

30312120112 is a deficient number, since it is larger than the sum of its proper divisors (28661311944).

30312120112 is a wasteful number, since it uses less digits than its factorization.

30312120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861276 (or 7861270 counting only the distinct ones).

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

Adding to 30312120112 its reverse (21102121303), we get a palindrome (51414241415).

The spelling of 30312120112 in words is "thirty billion, three hundred twelve million, one hundred twenty thousand, one hundred twelve".