22011212100221 has 8 divisors (see below), whose sum is σ = 22020648091200. Its totient is φ = 22001776747200.

The previous prime is 22011212100193. The next prime is 22011212100337. The reversal of 22011212100221 is 12200121211022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011212100221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22011212100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011212100821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76741445 + ... + 77027733.

It is an arithmetic number, because the mean of its divisors is an integer number (2752581011400).

Almost surely, 2^{22011212100221} is an apocalyptic number.

It is an amenable number.

22011212100221 is a deficient number, since it is larger than the sum of its proper divisors (9435990979).

22011212100221 is a wasteful number, since it uses less digits than its factorization.

22011212100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318979.

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

Adding to 22011212100221 its reverse (12200121211022), we get a palindrome (34211333311243).

The spelling of 22011212100221 in words is "twenty-two trillion, eleven billion, two hundred twelve million, one hundred thousand, two hundred twenty-one".