30121131212 has 6 divisors (see below), whose sum is σ = 52711979628. Its totient is φ = 15060565604.

The previous prime is 30121131203. The next prime is 30121131221. The reversal of 30121131212 is 21213112103.

It is an interprime number because it is at equal distance from previous prime (30121131203) and next prime (30121131221).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765141398 + ... + 3765141405.

It is an arithmetic number, because the mean of its divisors is an integer number (8785329938).

Almost surely, 2^30121131212 is an apocalyptic number.

It is an amenable number.

30121131212 is a deficient number, since it is larger than the sum of its proper divisors (22590848416).

30121131212 is a wasteful number, since it uses less digits than its factorization.

30121131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530282807 (or 7530282805 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 30121131212 its reverse (21213112103), we get a palindrome (51334243315).

The spelling of 30121131212 in words is "thirty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred twelve".