22022421202121 has 6 divisors (see below), whose sum is σ = 22356019923930. Its totient is φ = 21693728343936.

The previous prime is 22022421202099. The next prime is 22022421202141. The reversal of 22022421202121 is 12120212422022.

It can be written as a sum of positive squares in only one way, i.e., 13489011762121 + 8533409440000 = 3672739^2 + 2921200^2 .

It is not a de Polignac number, because 22022421202121 - 2⁶ = 22022421202057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22022421202141) 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 5 ways as a sum of consecutive naturals, for example, 2452927256 + ... + 2452936233.

It is an arithmetic number, because the mean of its divisors is an integer number (3726003320655).

Almost surely, 2^{22022421202121} is an apocalyptic number.

It is an amenable number.

22022421202121 is a deficient number, since it is larger than the sum of its proper divisors (333598721809).

22022421202121 is an frugal number, since it uses more digits than its factorization.

22022421202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905863623 (or 4905863556 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22022421202121 its reverse (12120212422022), we get a palindrome (34142633624143).

The spelling of 22022421202121 in words is "twenty-two trillion, twenty-two billion, four hundred twenty-one million, two hundred two thousand, one hundred twenty-one".