22222220101001 has 4 divisors (see below), whose sum is σ = 22641507272772. Its totient is φ = 21802932929232.

The previous prime is 22222220100887. The next prime is 22222220101007. The reversal of 22222220101001 is 10010102222222.

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 19255641015625 + 2966579085376 = 4388125^2 + 1722376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22222220101001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22222220101007) 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, 209643585806 + ... + 209643585911.

It is an arithmetic number, because the mean of its divisors is an integer number (5660376818193).

Almost surely, 2^{22222220101001} is an apocalyptic number.

It is an amenable number.

22222220101001 is a deficient number, since it is larger than the sum of its proper divisors (419287171771).

22222220101001 is an equidigital number, since it uses as much as digits as its factorization.

22222220101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419287171770.

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

Adding to 22222220101001 its reverse (10010102222222), we get a palindrome (32232322323223).

The spelling of 22222220101001 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty million, one hundred one thousand, one".