202121221122 has 48 divisors (see below), whose sum is σ = 451018601280. Its totient is φ = 65370152736.

The previous prime is 202121221037. The next prime is 202121221129. The reversal of 202121221122 is 221122121202.

It is a happy number.

202121221122 is a `hidden beast` number, since 202 + 121 + 221 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202121221095 and 202121221104.

It is not an unprimeable number, because it can be changed into a prime (202121221129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183588 + ... + 661775.

It is an arithmetic number, because the mean of its divisors is an integer number (9396220860).

Almost surely, 2^202121221122 is an apocalyptic number.

202121221122 is an abundant number, since it is smaller than the sum of its proper divisors (248897380158).

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

202121221122 is a wasteful number, since it uses less digits than its factorization.

202121221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845767 (or 845764 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202121221122 its reverse (221122121202), we get a palindrome (423243342324).

The spelling of 202121221122 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".