12021020032 has 64 divisors (see below), whose sum is σ = 27412043040. Its totient is φ = 5143818240.

The previous prime is 12021019949. The next prime is 12021020129. The reversal of 12021020032 is 23002012021.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 12021019994 and 12021020021.

It is a congruent number.

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, 582108 + ... + 602404.

Almost surely, 2^12021020032 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 12021020032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13706021520).

12021020032 is an abundant number, since it is smaller than the sum of its proper divisors (15391023008).

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

12021020032 is an equidigital number, since it uses as much as digits as its factorization.

12021020032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20979 (or 20967 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12021020032 its reverse (23002012021), we get a palindrome (35023032053).

The spelling of 12021020032 in words is "twelve billion, twenty-one million, twenty thousand, thirty-two".