21010342144013 has 4 divisors (see below), whose sum is σ = 21011323911228. Its totient is φ = 21009360376800.

The previous prime is 21010342144009. The next prime is 21010342144147. The reversal of 21010342144013 is 31044124301012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6580235648809 + 14430106495204 = 2565197^2 + 3798698^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010342144013 - 2² = 21010342144009 is a prime.

It is a super-3 number, since 3×21010342144013³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010342140013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490851506 + ... + 490894307.

It is an arithmetic number, because the mean of its divisors is an integer number (5252830977807).

Almost surely, 2^{21010342144013} is an apocalyptic number.

It is an amenable number.

21010342144013 is a deficient number, since it is larger than the sum of its proper divisors (981767215).

21010342144013 is an equidigital number, since it uses as much as digits as its factorization.

21010342144013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981767214.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21010342144013 its reverse (31044124301012), we get a palindrome (52054466445025).

The spelling of 21010342144013 in words is "twenty-one trillion, ten billion, three hundred forty-two million, one hundred forty-four thousand, thirteen".