22122100001 has 4 divisors (see below), whose sum is σ = 22122520452. Its totient is φ = 22121679552.

The previous prime is 22122099977. The next prime is 22122100027. The reversal of 22122100001 is 10000122122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10000122122 = 2 ⋅5000061061.

It can be written as a sum of positive squares in 2 ways, for example, as 8415310225 + 13706789776 = 91735^2 + 117076^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122100001 - 2¹⁴ = 22122083617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22122100031) 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, 117740 + ... + 241053.

It is an arithmetic number, because the mean of its divisors is an integer number (5530630113).

Almost surely, 2^22122100001 is an apocalyptic number.

It is an amenable number.

22122100001 is a deficient number, since it is larger than the sum of its proper divisors (420451).

22122100001 is an equidigital number, since it uses as much as digits as its factorization.

22122100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420450.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22122100001 its reverse (10000122122), we get a palindrome (32122222123).

It can be divided in two parts, 22122 and 100001, that multiplied together give a palindrome (2212222122).

The spelling of 22122100001 in words is "twenty-two billion, one hundred twenty-two million, one hundred thousand, one".