30111212 has 12 divisors (see below), whose sum is σ = 53044656. Its totient is φ = 14955600.

The previous prime is 30111197. The next prime is 30111217. The reversal of 30111212 is 21211103.

It is a junction number, because it is equal to n+sod(n) for n = 30111193 and 30111202.

It is not an unprimeable number, because it can be changed into a prime (30111217) 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, 24323 + ... + 25530.

It is an arithmetic number, because the mean of its divisors is an integer number (4420388).

Almost surely, 2^30111212 is an apocalyptic number.

It is an amenable number.

30111212 is a deficient number, since it is larger than the sum of its proper divisors (22933444).

30111212 is a wasteful number, since it uses less digits than its factorization.

30111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50008 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 30111212 is about 5487.3684038891. The cubic root of 30111212 is about 311.1067343867.

Adding to 30111212 its reverse (21211103), we get a palindrome (51322315).

The spelling of 30111212 in words is "thirty million, one hundred eleven thousand, two hundred twelve".