12121542032 has 40 divisors (see below), whose sum is σ = 24381445440. Its totient is φ = 5831038080.

The previous prime is 12121542031. The next prime is 12121542049. The reversal of 12121542032 is 23024512121.

It is a junction number, because it is equal to n+sod(n) for n = 12121541989 and 12121542007.

It is not an unprimeable number, because it can be changed into a prime (12121542031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85157 + ... + 177467.

It is an arithmetic number, because the mean of its divisors is an integer number (609536136).

Almost surely, 2^12121542032 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 12121542032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12190722720).

12121542032 is an abundant number, since it is smaller than the sum of its proper divisors (12259903408).

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

12121542032 is a wasteful number, since it uses less digits than its factorization.

12121542032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92631 (or 92625 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 12121542032 in words is "twelve billion, one hundred twenty-one million, five hundred forty-two thousand, thirty-two".