22021022121 has 16 divisors (see below), whose sum is σ = 33588172800. Its totient is φ = 12571317648.

The previous prime is 22021022071. The next prime is 22021022129. The reversal of 22021022121 is 12122012022.

It is not a de Polignac number, because 22021022121 - 2⁹ = 22021021609 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021022121.

It is not an unprimeable number, because it can be changed into a prime (22021022129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482811 + ... + 526448.

It is an arithmetic number, because the mean of its divisors is an integer number (2099260800).

Almost surely, 2^22021022121 is an apocalyptic number.

22021022121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22021022121 is a deficient number, since it is larger than the sum of its proper divisors (11567150679).

22021022121 is a wasteful number, since it uses less digits than its factorization.

22021022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010308.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22021022121 its reverse (12122012022), we get a palindrome (34143034143).

The spelling of 22021022121 in words is "twenty-two billion, twenty-one million, twenty-two thousand, one hundred twenty-one".