22111200001001 has 4 divisors (see below), whose sum is σ = 22473678689604. Its totient is φ = 21748721312400.

The previous prime is 22111200000853. The next prime is 22111200001039. The reversal of 22111200001001 is 10010000211122.

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 2116664175376 + 19994535825625 = 1454876^2 + 4471525^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111200001001 - 2²² = 22111195806697 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 (22111200001801) 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, 181239344210 + ... + 181239344331.

It is an arithmetic number, because the mean of its divisors is an integer number (5618419672401).

Almost surely, 2^{22111200001001} is an apocalyptic number.

It is an amenable number.

22111200001001 is a deficient number, since it is larger than the sum of its proper divisors (362478688603).

22111200001001 is an equidigital number, since it uses as much as digits as its factorization.

22111200001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362478688602.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22111200001001 its reverse (10010000211122), we get a palindrome (32121200212123).

The spelling of 22111200001001 in words is "twenty-two trillion, one hundred eleven billion, two hundred million, one thousand, one".