21401301444145 has 16 divisors (see below), whose sum is σ = 29355971660928. Its totient is φ = 14672370435840.

The previous prime is 21401301444097. The next prime is 21401301444161. The reversal of 21401301444145 is 54144410310412.

It is not a de Polignac number, because 21401301444145 - 2¹¹ = 21401301442097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21401301444145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58308136 + ... + 58674025.

It is an arithmetic number, because the mean of its divisors is an integer number (1834748228808).

Almost surely, 2^{21401301444145} is an apocalyptic number.

It is an amenable number.

21401301444145 is a deficient number, since it is larger than the sum of its proper divisors (7954670216783).

21401301444145 is a wasteful number, since it uses less digits than its factorization.

21401301444145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116987400.

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 21401301444145 its reverse (54144410310412), we get a palindrome (75545711754557).

The spelling of 21401301444145 in words is "twenty-one trillion, four hundred one billion, three hundred one million, four hundred forty-four thousand, one hundred forty-five".