21140045042245 has 8 divisors (see below), whose sum is σ = 25370787438360. Its totient is φ = 16910213775360.

The previous prime is 21140045042239. The next prime is 21140045042269. The reversal of 21140045042245 is 54224054004112.

It can be written as a sum of positive squares in 4 ways, for example, as 7746831255969 + 13393213786276 = 2783313^2 + 3659674^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21140045042245 - 2⁵ = 21140045042213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21140045042245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227731260 + ... + 227824069.

It is an arithmetic number, because the mean of its divisors is an integer number (3171348429795).

Almost surely, 2^{21140045042245} is an apocalyptic number.

It is an amenable number.

21140045042245 is a deficient number, since it is larger than the sum of its proper divisors (4230742396115).

21140045042245 is an equidigital number, since it uses as much as digits as its factorization.

21140045042245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455564615.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 21140045042245 its reverse (54224054004112), we get a palindrome (75364099046357).

The spelling of 21140045042245 in words is "twenty-one trillion, one hundred forty billion, forty-five million, forty-two thousand, two hundred forty-five".