30310120212 has 12 divisors (see below), whose sum is σ = 70723613856. Its totient is φ = 10103373400.

The previous prime is 30310120189. The next prime is 30310120219. The reversal of 30310120212 is 21202101303.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 30310120191 and 30310120200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30310120219) 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, 1262921664 + ... + 1262921687.

It is an arithmetic number, because the mean of its divisors is an integer number (5893634488).

Almost surely, 2^30310120212 is an apocalyptic number.

It is an amenable number.

30310120212 is an abundant number, since it is smaller than the sum of its proper divisors (40413493644).

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

30310120212 is a wasteful number, since it uses less digits than its factorization.

30310120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525843358 (or 2525843356 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30310120212 its reverse (21202101303), we get a palindrome (51512221515).

The spelling of 30310120212 in words is "thirty billion, three hundred ten million, one hundred twenty thousand, two hundred twelve".