202122111220 has 48 divisors (see below), whose sum is σ = 433392156288. Its totient is φ = 79153343360.

The previous prime is 202122111211. The next prime is 202122111221. The reversal of 202122111220 is 22111221202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202122111194 and 202122111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122111221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290865 + ... + 699175.

It is an arithmetic number, because the mean of its divisors is an integer number (9029003256).

Almost surely, 2^202122111220 is an apocalyptic number.

202122111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202122111220 is an abundant number, since it is smaller than the sum of its proper divisors (231270045068).

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

202122111220 is a wasteful number, since it uses less digits than its factorization.

202122111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408840 (or 408838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202122111220 its reverse (22111221202), we get a palindrome (224233332422).

The spelling of 202122111220 in words is "two hundred two billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty".