202120220020 has 12 divisors (see below), whose sum is σ = 424452462084. Its totient is φ = 80848088000.

The previous prime is 202120220009. The next prime is 202120220041. The reversal of 202120220020 is 20022021202.

It can be written as a sum of positive squares in 2 ways, for example, as 143062471696 + 59057748324 = 378236^2 + 243018^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053005481 + ... + 5053005520.

It is an arithmetic number, because the mean of its divisors is an integer number (35371038507).

Almost surely, 2^202120220020 is an apocalyptic number.

202120220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120220020 is an abundant number, since it is smaller than the sum of its proper divisors (222332242064).

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

202120220020 is a wasteful number, since it uses less digits than its factorization.

202120220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106011010 (or 10106011008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 202120220020 its reverse (20022021202), we get a palindrome (222142241222).

The spelling of 202120220020 in words is "two hundred two billion, one hundred twenty million, two hundred twenty thousand, twenty".