30121131232 has 96 divisors (see below), whose sum is σ = 61958856960. Its totient is φ = 14402411520.

The previous prime is 30121131221. The next prime is 30121131263. The reversal of 30121131232 is 23213112103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25247628 + ... + 25248820.

It is an arithmetic number, because the mean of its divisors is an integer number (645404760).

Almost surely, 2^30121131232 is an apocalyptic number.

30121131232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30979428480).

30121131232 is an abundant number, since it is smaller than the sum of its proper divisors (31837725728).

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

30121131232 is a wasteful number, since it uses less digits than its factorization.

30121131232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 30121131232 its reverse (23213112103), we get a palindrome (53334243335).

The spelling of 30121131232 in words is "thirty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred thirty-two".