21144423122099 has 6 divisors (see below), whose sum is σ = 21848503809780. Its totient is φ = 20462344955940.

The previous prime is 21144423122059. The next prime is 21144423122107. The reversal of 21144423122099 is 99022132444112.

It is not a de Polignac number, because 21144423122099 - 2²⁸ = 21144154686643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21144423122059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11001259769 + ... + 11001261690.

It is an arithmetic number, because the mean of its divisors is an integer number (3641417301630).

Almost surely, 2^{21144423122099} is an apocalyptic number.

21144423122099 is a deficient number, since it is larger than the sum of its proper divisors (704080687681).

21144423122099 is an equidigital number, since it uses as much as digits as its factorization.

21144423122099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22002521521 (or 22002521490 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 21144423122099 in words is "twenty-one trillion, one hundred forty-four billion, four hundred twenty-three million, one hundred twenty-two thousand, ninety-nine".