22222211002001 has 4 divisors (see below), whose sum is σ = 22335014103732. Its totient is φ = 22109407900272.

The previous prime is 22222211001997. The next prime is 22222211002027. The reversal of 22222211002001 is 10020011222222.

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 15615743208976 + 6606467793025 = 3951676^2 + 2570305^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222211002001 - 2² = 22222211001997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222211002501) 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, 56401550570 + ... + 56401550963.

It is an arithmetic number, because the mean of its divisors is an integer number (5583753525933).

Almost surely, 2^{22222211002001} is an apocalyptic number.

It is an amenable number.

22222211002001 is a deficient number, since it is larger than the sum of its proper divisors (112803101731).

22222211002001 is a wasteful number, since it uses less digits than its factorization.

22222211002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112803101730.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22222211002001 its reverse (10020011222222), we get a palindrome (32242222224223).

The spelling of 22222211002001 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred eleven million, two thousand, one".