21144423122107 has 2 divisors, whose sum is σ = 21144423122108. Its totient is φ = 21144423122106.

The previous prime is 21144423122059. The next prime is 21144423122149. The reversal of 21144423122107 is 70122132444112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21144423122107 - 2³⁹ = 20594667308219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21144423102107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572211561053 + 10572211561054.

It is an arithmetic number, because the mean of its divisors is an integer number (10572211561054).

Almost surely, 2^{21144423122107} is an apocalyptic number.

21144423122107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144423122107 is an equidigital number, since it uses as much as digits as its factorization.

21144423122107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

Adding to 21144423122107 its reverse (70122132444112), we get a palindrome (91266555566219).

The spelling of 21144423122107 in words is "twenty-one trillion, one hundred forty-four billion, four hundred twenty-three million, one hundred twenty-two thousand, one hundred seven".