22202200001221 has 4 divisors (see below), whose sum is σ = 22203605486412. Its totient is φ = 22200794516032.

The previous prime is 22202200001153. The next prime is 22202200001237. The reversal of 22202200001221 is 12210000220222.

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 10040589978721 + 12161610022500 = 3168689^2 + 3487350^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202200001221 - 2⁹ = 22202200000709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22202200001195 and 22202200001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202200001521) 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, 702718900 + ... + 702750493.

It is an arithmetic number, because the mean of its divisors is an integer number (5550901371603).

Almost surely, 2^{22202200001221} is an apocalyptic number.

It is an amenable number.

22202200001221 is a deficient number, since it is larger than the sum of its proper divisors (1405485191).

22202200001221 is a wasteful number, since it uses less digits than its factorization.

22202200001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405485190.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22202200001221 its reverse (12210000220222), we get a palindrome (34412200221443).

The spelling of 22202200001221 in words is "twenty-two trillion, two hundred two billion, two hundred million, one thousand, two hundred twenty-one".