20121021032 has 64 divisors (see below), whose sum is σ = 43649798400. Its totient is φ = 8516851200.

The previous prime is 20121021031. The next prime is 20121021059. The reversal of 20121021032 is 23012012102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20121020998 and 20121021016.

It is not an unprimeable number, because it can be changed into a prime (20121021031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6093782 + ... + 6097082.

It is an arithmetic number, because the mean of its divisors is an integer number (682028100).

Almost surely, 2^20121021032 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 20121021032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21824899200).

20121021032 is an abundant number, since it is smaller than the sum of its proper divisors (23528777368).

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

20121021032 is a wasteful number, since it uses less digits than its factorization.

20121021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626 (or 4622 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20121021032 its reverse (23012012102), we get a palindrome (43133033134).

The spelling of 20121021032 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, thirty-two".