22213121221201 has 4 divisors (see below), whose sum is σ = 22213131600052. Its totient is φ = 22213110842352.

The previous prime is 22213121221189. The next prime is 22213121221217. The reversal of 22213121221201 is 10212212131222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15718528915600 + 6494592305601 = 3964660^2 + 2548449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22213121221201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22213121221001) 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, 663090 + ... + 6698203.

It is an arithmetic number, because the mean of its divisors is an integer number (5553282900013).

Almost surely, 2^{22213121221201} is an apocalyptic number.

It is an amenable number.

22213121221201 is a deficient number, since it is larger than the sum of its proper divisors (10378851).

22213121221201 is an equidigital number, since it uses as much as digits as its factorization.

22213121221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378850.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 22213121221201 its reverse (10212212131222), we get a palindrome (32425333352423).

The spelling of 22213121221201 in words is "twenty-two trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".