21711222211713 has 16 divisors (see below), whose sum is σ = 28964152276800. Its totient is φ = 14466221561664.

The previous prime is 21711222211667. The next prime is 21711222211747. The reversal of 21711222211713 is 31711222211712.

It is a happy number.

It is not a de Polignac number, because 21711222211713 - 2¹⁷ = 21711222080641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21711222211753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63135963 + ... + 63478911.

It is an arithmetic number, because the mean of its divisors is an integer number (1810259517300).

Almost surely, 2^{21711222211713} is an apocalyptic number.

It is an amenable number.

21711222211713 is a deficient number, since it is larger than the sum of its proper divisors (7252930065087).

21711222211713 is a wasteful number, since it uses less digits than its factorization.

21711222211713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354448.

The product of its digits is 4704, while the sum is 33.

Subtracting 21711222211713 from its reverse (31711222211712), we obtain a palindrome (9999999999999).

The spelling of 21711222211713 in words is "twenty-one trillion, seven hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, seven hundred thirteen".