30312312012 has 72 divisors (see below), whose sum is σ = 79802285472. Its totient is φ = 9692524800.

The previous prime is 30312312011. The next prime is 30312312013. The reversal of 30312312012 is 21021321303.

30312312012 is a `hidden beast` number, since 30 + 312 + 312 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (30312312011) and next prime (30312312013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30312312011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65689 + ... + 254832.

It is an arithmetic number, because the mean of its divisors is an integer number (1108365076).

Almost surely, 2^30312312012 is an apocalyptic number.

It is an amenable number.

30312312012 is an abundant number, since it is smaller than the sum of its proper divisors (49489973460).

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

30312312012 is a wasteful number, since it uses less digits than its factorization.

30312312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320639 (or 320634 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30312312012 its reverse (21021321303), we get a palindrome (51333633315).

The spelling of 30312312012 in words is "thirty billion, three hundred twelve million, three hundred twelve thousand, twelve".