20201021312 has 64 divisors (see below), whose sum is σ = 42782288400. Its totient is φ = 9474048000.

The previous prime is 20201021311. The next prime is 20201021359. The reversal of 20201021312 is 21312010202.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201021311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204512 + ... + 286752.

Almost surely, 2^20201021312 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 20201021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21391144200).

20201021312 is an abundant number, since it is smaller than the sum of its proper divisors (22581267088).

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

20201021312 is a wasteful number, since it uses less digits than its factorization.

20201021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82375 (or 82363 counting only the distinct ones).

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

Adding to 20201021312 its reverse (21312010202), we get a palindrome (41513031514).

It can be divided in two parts, 202010 and 21312, that added together give a palindrome (223322).

The spelling of 20201021312 in words is "twenty billion, two hundred one million, twenty-one thousand, three hundred twelve".