22121010122201 has 4 divisors (see below), whose sum is σ = 22129236606900. Its totient is φ = 22112783637504.

The previous prime is 22121010122177. The next prime is 22121010122213. The reversal of 22121010122201 is 10222101012122.

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 3204730110976 + 18916280011225 = 1790176^2 + 4349285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121010122201 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 22121010122201.

It is not an unprimeable number, because it can be changed into a prime (22121010124201) 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, 4113238316 + ... + 4113243693.

It is an arithmetic number, because the mean of its divisors is an integer number (5532309151725).

Almost surely, 2^{22121010122201} is an apocalyptic number.

It is an amenable number.

22121010122201 is a deficient number, since it is larger than the sum of its proper divisors (8226484699).

22121010122201 is an equidigital number, since it uses as much as digits as its factorization.

22121010122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226484698.

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

Adding to 22121010122201 its reverse (10222101012122), we get a palindrome (32343111134323).

The spelling of 22121010122201 in words is "twenty-two trillion, one hundred twenty-one billion, ten million, one hundred twenty-two thousand, two hundred one".