30121021332 has 72 divisors (see below), whose sum is σ = 79022143200. Its totient is φ = 9662442048.

The previous prime is 30121021313. The next prime is 30121021339. The reversal of 30121021332 is 23312012103.

30121021332 is a `hidden beast` number, since 301 + 2 + 10 + 21 + 332 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121021339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273519 + ... + 367497.

Almost surely, 2^30121021332 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 30121021332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39511071600).

30121021332 is an abundant number, since it is smaller than the sum of its proper divisors (48901121868).

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

30121021332 is a wasteful number, since it uses less digits than its factorization.

30121021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94325 (or 94320 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30121021332 its reverse (23312012103), we get a palindrome (53433033435).

The spelling of 30121021332 in words is "thirty billion, one hundred twenty-one million, twenty-one thousand, three hundred thirty-two".