30121122312 has 48 divisors (see below), whose sum is σ = 82340472240. Its totient is φ = 9946536288.

The previous prime is 30121122307. The next prime is 30121122337. The reversal of 30121122312 is 21322112103.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1947198 + ... + 1962605.

It is an arithmetic number, because the mean of its divisors is an integer number (1715426505).

Almost surely, 2^30121122312 is an apocalyptic number.

It is an amenable number.

30121122312 is an abundant number, since it is smaller than the sum of its proper divisors (52219349928).

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

30121122312 is a wasteful number, since it uses less digits than its factorization.

30121122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909922 (or 3909915 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30121122312 its reverse (21322112103), we get a palindrome (51443234415).

The spelling of 30121122312 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-two thousand, three hundred twelve".