202122222021 has 16 divisors (see below), whose sum is σ = 299462425920. Its totient is φ = 134738204400.

The previous prime is 202122222011. The next prime is 202122222037. The reversal of 202122222021 is 120222221202.

202122222021 is a `hidden beast` number, since 202 + 1 + 222 + 220 + 21 = 666.

It is not a de Polignac number, because 202122222021 - 2⁶ = 202122221957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202122221985 and 202122222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122222011) 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, 106066 + ... + 644588.

It is an arithmetic number, because the mean of its divisors is an integer number (18716401620).

Almost surely, 2^202122222021 is an apocalyptic number.

It is an amenable number.

202122222021 is a deficient number, since it is larger than the sum of its proper divisors (97340203899).

202122222021 is a wasteful number, since it uses less digits than its factorization.

202122222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552433 (or 552427 counting only the distinct ones).

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

Adding to 202122222021 its reverse (120222221202), we get a palindrome (322344443223).

The spelling of 202122222021 in words is "two hundred two billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".