22000020012221 has 16 divisors (see below), whose sum is σ = 22980147313536. Its totient is φ = 21021870245376.

The previous prime is 22000020012193. The next prime is 22000020012263. The reversal of 22000020012221 is 12221002000022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000020012221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22000020012196 and 22000020012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000020012121) 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, 93931166 + ... + 94165088.

It is an arithmetic number, because the mean of its divisors is an integer number (1436259207096).

Almost surely, 2^{22000020012221} is an apocalyptic number.

It is an amenable number.

22000020012221 is a deficient number, since it is larger than the sum of its proper divisors (980127301315).

22000020012221 is a wasteful number, since it uses less digits than its factorization.

22000020012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238132.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22000020012221 its reverse (12221002000022), we get a palindrome (34221022012243).

The spelling of 22000020012221 in words is "twenty-two trillion, twenty million, twelve thousand, two hundred twenty-one".