30121043140 has 96 divisors (see below), whose sum is σ = 69188515200. Its totient is φ = 10971233280.

The previous prime is 30121043131. The next prime is 30121043167. The reversal of 30121043140 is 4134012103.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2495520 + ... + 2507560.

It is an arithmetic number, because the mean of its divisors is an integer number (720713700).

Almost surely, 2^30121043140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121043140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34594257600).

30121043140 is an abundant number, since it is smaller than the sum of its proper divisors (39067472060).

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

30121043140 is a wasteful number, since it uses less digits than its factorization.

30121043140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12325 (or 12323 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 30121043140 its reverse (4134012103), we get a palindrome (34255055243).

The spelling of 30121043140 in words is "thirty billion, one hundred twenty-one million, forty-three thousand, one hundred forty".