21013332411242 has 16 divisors (see below), whose sum is σ = 31690431760680. Its totient is φ = 10449890286528.

The previous prime is 21013332411173. The next prime is 21013332411271. The reversal of 21013332411242 is 24211423331012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20026153053481 + 987179357761 = 4475059^2 + 993569^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7584017 + ... + 9977172.

Almost surely, 2^{21013332411242} is an apocalyptic number.

21013332411242 is a deficient number, since it is larger than the sum of its proper divisors (10677099349438).

21013332411242 is a wasteful number, since it uses less digits than its factorization.

21013332411242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17564425.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21013332411242 its reverse (24211423331012), we get a palindrome (45224755742254).

The spelling of 21013332411242 in words is "twenty-one trillion, thirteen billion, three hundred thirty-two million, four hundred eleven thousand, two hundred forty-two".