201021212112020 has 192 divisors, whose sum is σ = 466294262353920. Its totient is φ = 72461620224000.

The previous prime is 201021212111963. The next prime is 201021212112047. The reversal of 201021212112020 is 20211212120102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 201021212112020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 805226057 + ... + 805475663.

It is an arithmetic number, because the mean of its divisors is an integer number (2428615949760).

Almost surely, 2^{201021212112020} is an apocalyptic number.

201021212112020 is a gapful number since it is divisible by the number (20) 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 201021212112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233147131176960).

201021212112020 is an abundant number, since it is smaller than the sum of its proper divisors (265273050241900).

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

201021212112020 is a wasteful number, since it uses less digits than its factorization.

201021212112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250474 (or 250472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201021212112020 its reverse (20211212120102), we get a palindrome (221232424232122).

The spelling of 201021212112020 in words is "two hundred one trillion, twenty-one billion, two hundred twelve million, one hundred twelve thousand, twenty".