22102121100221 has 4 divisors (see below), whose sum is σ = 22102562143200. Its totient is φ = 22101680057244.

The previous prime is 22102121100197. The next prime is 22102121100259. The reversal of 22102121100221 is 12200112120122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22102121100221 is a prime.

It is a super-3 number, since 3×22102121100221³ (a number of 41 digits) contains 333 as substring.

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 22102121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102121100821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220446311 + ... + 220546548.

It is an arithmetic number, because the mean of its divisors is an integer number (5525640535800).

Almost surely, 2^{22102121100221} is an apocalyptic number.

It is an amenable number.

22102121100221 is a deficient number, since it is larger than the sum of its proper divisors (441042979).

22102121100221 is an equidigital number, since it uses as much as digits as its factorization.

22102121100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441042978.

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

Adding to 22102121100221 its reverse (12200112120122), we get a palindrome (34302233220343).

The spelling of 22102121100221 in words is "twenty-two trillion, one hundred two billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".