202102231020 has 96 divisors (see below), whose sum is σ = 582295058688. Its totient is φ = 52336772352.

The previous prime is 202102231007. The next prime is 202102231039. The reversal of 202102231020 is 20132201202.

It is a happy number.

It is a super-2 number, since 2×202102231020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1074027 + ... + 1248093.

It is an arithmetic number, because the mean of its divisors is an integer number (6065573528).

Almost surely, 2^202102231020 is an apocalyptic number.

202102231020 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 202102231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291147529344).

202102231020 is an abundant number, since it is smaller than the sum of its proper divisors (380192827668).

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

202102231020 is a wasteful number, since it uses less digits than its factorization.

202102231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174639 (or 174637 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 202102231020 its reverse (20132201202), we get a palindrome (222234432222).

The spelling of 202102231020 in words is "two hundred two billion, one hundred two million, two hundred thirty-one thousand, twenty".