21010330412405 has 16 divisors (see below), whose sum is σ = 27133109445744. Its totient is φ = 15560206126080.

The previous prime is 21010330412347. The next prime is 21010330412413. The reversal of 21010330412405 is 50421403301012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 195648751684 + 20814681660721 = 442322^2 + 4562311^2 .

It is not a de Polignac number, because 21010330412405 - 2¹⁴ = 21010330396021 is a prime.

It is a Duffinian number.

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, 2026063322 + ... + 2026073691.

It is an arithmetic number, because the mean of its divisors is an integer number (1695819340359).

Almost surely, 2^{21010330412405} is an apocalyptic number.

It is an amenable number.

21010330412405 is a deficient number, since it is larger than the sum of its proper divisors (6122779033339).

21010330412405 is a wasteful number, since it uses less digits than its factorization.

21010330412405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052137096.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21010330412405 its reverse (50421403301012), we get a palindrome (71431733713417).

The spelling of 21010330412405 in words is "twenty-one trillion, ten billion, three hundred thirty million, four hundred twelve thousand, four hundred five".