22001012112221 has 8 divisors (see below), whose sum is σ = 22270341550464. Its totient is φ = 21731784031360.

The previous prime is 22001012112193. The next prime is 22001012112229. The reversal of 22001012112221 is 12221121010022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22001012112221 - 2³⁸ = 21726134205277 is a prime.

It is a Duffinian number.

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 22001012112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001012112229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24902516 + ... + 25770861.

It is an arithmetic number, because the mean of its divisors is an integer number (2783792693808).

Almost surely, 2^{22001012112221} is an apocalyptic number.

It is an amenable number.

22001012112221 is a deficient number, since it is larger than the sum of its proper divisors (269329438243).

22001012112221 is an equidigital number, since it uses as much as digits as its factorization.

22001012112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50678691.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22001012112221 its reverse (12221121010022), we get a palindrome (34222133122243).

The spelling of 22001012112221 in words is "twenty-two trillion, one billion, twelve million, one hundred twelve thousand, two hundred twenty-one".