21201122100023 has 2 divisors, whose sum is σ = 21201122100024. Its totient is φ = 21201122100022.

The previous prime is 21201122099999. The next prime is 21201122100031. The reversal of 21201122100023 is 32000122110212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201122100023 - 2⁸ = 21201122099767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201122099974 and 21201122100010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201122100623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600561050011 + 10600561050012.

It is an arithmetic number, because the mean of its divisors is an integer number (10600561050012).

Almost surely, 2^{21201122100023} is an apocalyptic number.

21201122100023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201122100023 is an equidigital number, since it uses as much as digits as its factorization.

21201122100023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21201122100023 its reverse (32000122110212), we get a palindrome (53201244210235).

The spelling of 21201122100023 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-two million, one hundred thousand, twenty-three".