202111112121220 has 24 divisors (see below), whose sum is σ = 431391258989208. Its totient is φ = 79519126080000.

The previous prime is 202111112121187. The next prime is 202111112121221. The reversal of 202111112121220 is 22121211111202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29320665500736 + 172790446620484 = 5414856^2 + 13144978^2 .

It is not an unprimeable number, because it can be changed into a prime (202111112121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82832421781 + ... + 82832424220.

It is an arithmetic number, because the mean of its divisors is an integer number (17974635791217).

Almost surely, 2^{202111112121220} is an apocalyptic number.

202111112121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202111112121220 is an abundant number, since it is smaller than the sum of its proper divisors (229280146867988).

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

202111112121220 is a wasteful number, since it uses less digits than its factorization.

202111112121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165664846071 (or 165664846069 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 202111112121220 its reverse (22121211111202), we get a palindrome (224232323232422).

The spelling of 202111112121220 in words is "two hundred two trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty".