30021123140 has 24 divisors (see below), whose sum is σ = 66752851032. Its totient is φ = 11302069760.

The previous prime is 30021123131. The next prime is 30021123161. The reversal of 30021123140 is 4132112003.

It can be written as a sum of positive squares in 4 ways, for example, as 708943876 + 29312179264 = 26626^2 + 171208^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44148371 + ... + 44149050.

It is an arithmetic number, because the mean of its divisors is an integer number (2781368793).

Almost surely, 2^30021123140 is an apocalyptic number.

It is an amenable number.

30021123140 is an abundant number, since it is smaller than the sum of its proper divisors (36731727892).

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

30021123140 is a wasteful number, since it uses less digits than its factorization.

30021123140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88297447 (or 88297445 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30021123140 its reverse (4132112003), we get a palindrome (34153235143).

The spelling of 30021123140 in words is "thirty billion, twenty-one million, one hundred twenty-three thousand, one hundred forty".