22121022020221 has 16 divisors (see below), whose sum is σ = 22986720691200. Its totient is φ = 21264841728000.

The previous prime is 22121022020173. The next prime is 22121022020267. The reversal of 22121022020221 is 12202022012122.

It is a cyclic number.

It is not a de Polignac number, because 22121022020221 - 2¹³ = 22121022012029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121022024221) 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, 144421245 + ... + 144574333.

It is an arithmetic number, because the mean of its divisors is an integer number (1436670043200).

Almost surely, 2^{22121022020221} is an apocalyptic number.

It is an amenable number.

22121022020221 is a deficient number, since it is larger than the sum of its proper divisors (865698670979).

22121022020221 is a wasteful number, since it uses less digits than its factorization.

22121022020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184140.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22121022020221 its reverse (12202022012122), we get a palindrome (34323044032343).

The spelling of 22121022020221 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, twenty thousand, two hundred twenty-one".