22101012200221 has 4 divisors (see below), whose sum is σ = 22119414376444. Its totient is φ = 22082610024000.

The previous prime is 22101012200167. The next prime is 22101012200263. The reversal of 22101012200221 is 12200221010122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2842211604996 + 19258800595225 = 1685886^2 + 4388485^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101012200221 - 2²⁵ = 22100978645789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22101012200195 and 22101012200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101012200291) 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, 9201086310 + ... + 9201088711.

It is an arithmetic number, because the mean of its divisors is an integer number (5529853594111).

Almost surely, 2^{22101012200221} is an apocalyptic number.

It is an amenable number.

22101012200221 is a deficient number, since it is larger than the sum of its proper divisors (18402176223).

22101012200221 is a wasteful number, since it uses less digits than its factorization.

22101012200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18402176222.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22101012200221 its reverse (12200221010122), we get a palindrome (34301233210343).

The spelling of 22101012200221 in words is "twenty-two trillion, one hundred one billion, twelve million, two hundred thousand, two hundred twenty-one".