202021020102 has 64 divisors (see below), whose sum is σ = 452742441984. Its totient is φ = 59578110240.

The previous prime is 202021020101. The next prime is 202021020109. The reversal of 202021020102 is 201020120202.

202021020102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021020101) 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, 91813 + ... + 642239.

It is an arithmetic number, because the mean of its divisors is an integer number (7074100656).

Almost surely, 2^202021020102 is an apocalyptic number.

202021020102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 202021020102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226371220992).

202021020102 is an abundant number, since it is smaller than the sum of its proper divisors (250721421882).

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

202021020102 is a wasteful number, since it uses less digits than its factorization.

202021020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550593.

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

Adding to 202021020102 its reverse (201020120202), we get a palindrome (403041140304).

The spelling of 202021020102 in words is "two hundred two billion, twenty-one million, twenty thousand, one hundred two".