202222022121 has 64 divisors (see below), whose sum is σ = 347331479040. Its totient is φ = 113897871360.

The previous prime is 202222022087. The next prime is 202222022129. The reversal of 202222022121 is 121220222202.

202222022121 is a `hidden beast` number, since 202 + 2 + 220 + 221 + 21 = 666.

It is not a de Polignac number, because 202222022121 - 2⁷ = 202222021993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202222022094 and 202222022103.

It is not an unprimeable number, because it can be changed into a prime (202222022129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3839461 + ... + 3891773.

It is an arithmetic number, because the mean of its divisors is an integer number (5427054360).

Almost surely, 2^202222022121 is an apocalyptic number.

202222022121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202222022121 is a deficient number, since it is larger than the sum of its proper divisors (145109456919).

202222022121 is a wasteful number, since it uses less digits than its factorization.

202222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52623 (or 52617 counting only the distinct ones).

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

Adding to 202222022121 its reverse (121220222202), we get a palindrome (323442244323).

The spelling of 202222022121 in words is "two hundred two billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".