21105310702273 has 24 divisors (see below), whose sum is σ = 24969654639360. Its totient is φ = 17781900141600.

The previous prime is 21105310702271. The next prime is 21105310702309. The reversal of 21105310702273 is 37220701350112.

It is not a de Polignac number, because 21105310702273 - 2¹ = 21105310702271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21105310702271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29425840 + ... + 30134542.

It is an arithmetic number, because the mean of its divisors is an integer number (1040402276640).

Almost surely, 2^{21105310702273} is an apocalyptic number.

It is an amenable number.

21105310702273 is a deficient number, since it is larger than the sum of its proper divisors (3864343937087).

21105310702273 is a wasteful number, since it uses less digits than its factorization.

21105310702273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719077 (or 719070 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The spelling of 21105310702273 in words is "twenty-one trillion, one hundred five billion, three hundred ten million, seven hundred two thousand, two hundred seventy-three".