202021201020 has 96 divisors (see below), whose sum is σ = 615120948288. Its totient is φ = 49332989952.

The previous prime is 202021201013. The next prime is 202021201021. The reversal of 202021201020 is 20102120202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 202021200987 and 202021201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021201021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2638747 + ... + 2714226.

It is an arithmetic number, because the mean of its divisors is an integer number (6407509878).

Almost surely, 2^202021201020 is an apocalyptic number.

202021201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021201020 is an abundant number, since it is smaller than the sum of its proper divisors (413099747268).

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

202021201020 is a wasteful number, since it uses less digits than its factorization.

202021201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353039 (or 5353037 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202021201020 its reverse (20102120202), we get a palindrome (222123321222).

The spelling of 202021201020 in words is "two hundred two billion, twenty-one million, two hundred one thousand, twenty".