202112202021020 has 48 divisors (see below), whose sum is σ = 450233114482368. Its totient is φ = 75948653859840.

The previous prime is 202112202020951. The next prime is 202112202021029. The reversal of 202112202021020 is 20120202211202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 202112202021020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112202021029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 549213152 + ... + 549581031.

It is an arithmetic number, because the mean of its divisors is an integer number (9379856551716).

Almost surely, 2^{202112202021020} is an apocalyptic number.

202112202021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202112202021020 is an abundant number, since it is smaller than the sum of its proper divisors (248120912461348).

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

202112202021020 is a wasteful number, since it uses less digits than its factorization.

202112202021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098794750 (or 1098794748 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202112202021020 its reverse (20120202211202), we get a palindrome (222232404232222).

The spelling of 202112202021020 in words is "two hundred two trillion, one hundred twelve billion, two hundred two million, twenty-one thousand, twenty".