202121222022 has 16 divisors (see below), whose sum is σ = 449158271280. Its totient is φ = 67373740656.

The previous prime is 202121222021. The next prime is 202121222027. The reversal of 202121222022 is 220222121202.

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 = 202121221986 and 202121222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121222021) 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, 1871492743 + ... + 1871492850.

It is an arithmetic number, because the mean of its divisors is an integer number (28072391955).

Almost surely, 2^202121222022 is an apocalyptic number.

202121222022 is an abundant number, since it is smaller than the sum of its proper divisors (247037049258).

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

202121222022 is a wasteful number, since it uses less digits than its factorization.

202121222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742985604 (or 3742985598 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202121222022 its reverse (220222121202), we get a palindrome (422343343224).

The spelling of 202121222022 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-two".