202102021020 has 24 divisors (see below), whose sum is σ = 565885659024. Its totient is φ = 53893872256.

The previous prime is 202102021001. The next prime is 202102021027. The reversal of 202102021020 is 20120201202.

202102021020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 202102020987 and 202102021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684183449 + ... + 1684183568.

It is an arithmetic number, because the mean of its divisors is an integer number (23578569126).

Almost surely, 2^202102021020 is an apocalyptic number.

202102021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102021020 is an abundant number, since it is smaller than the sum of its proper divisors (363783638004).

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

202102021020 is a wasteful number, since it uses less digits than its factorization.

202102021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368367029 (or 3368367027 counting only the distinct ones).

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

Adding to 202102021020 its reverse (20120201202), we get a palindrome (222222222222).

The spelling of 202102021020 in words is "two hundred two billion, one hundred two million, twenty-one thousand, twenty".