21010327742273 has 4 divisors (see below), whose sum is σ = 21010338202368. Its totient is φ = 21010317282180.

The previous prime is 21010327742251. The next prime is 21010327742297. The reversal of 21010327742273 is 37224772301012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21010327742273 - 2²⁴ = 21010310965057 is a prime.

It is a super-2 number, since 2×21010327742273² (a number of 27 digits) contains 22 as substring.

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 21010327742273.

It is not an unprimeable number, because it can be changed into a prime (21010327042273) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1162793 + ... + 6585798.

It is an arithmetic number, because the mean of its divisors is an integer number (5252584550592).

Almost surely, 2^{21010327742273} is an apocalyptic number.

It is an amenable number.

21010327742273 is a deficient number, since it is larger than the sum of its proper divisors (10460095).

21010327742273 is an equidigital number, since it uses as much as digits as its factorization.

21010327742273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10460094.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 21010327742273 in words is "twenty-one trillion, ten billion, three hundred twenty-seven million, seven hundred forty-two thousand, two hundred seventy-three".