21444122055 has 16 divisors (see below), whose sum is σ = 34314624000. Its totient is φ = 11435522208.

The previous prime is 21444122039. The next prime is 21444122069. The reversal of 21444122055 is 55022144412.

It is not a de Polignac number, because 21444122055 - 2⁴ = 21444122039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55554 + ... + 214416.

It is an arithmetic number, because the mean of its divisors is an integer number (2144664000).

Almost surely, 2^21444122055 is an apocalyptic number.

21444122055 is a deficient number, since it is larger than the sum of its proper divisors (12870501945).

21444122055 is a wasteful number, since it uses less digits than its factorization.

21444122055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167870.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 21444122055 its reverse (55022144412), we get a palindrome (76466266467).

The spelling of 21444122055 in words is "twenty-one billion, four hundred forty-four million, one hundred twenty-two thousand, fifty-five".