21224522542213 has 16 divisors (see below), whose sum is σ = 21883678709760. Its totient is φ = 20577095890416.

The previous prime is 21224522542129. The next prime is 21224522542243. The reversal of 21224522542213 is 31224522542212.

It is a cyclic number.

It is not a de Polignac number, because 21224522542213 - 2²¹ = 21224520445061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224522542243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6130395 + ... + 8945992.

It is an arithmetic number, because the mean of its divisors is an integer number (1367729919360).

Almost surely, 2^{21224522542213} is an apocalyptic number.

It is an amenable number.

21224522542213 is a deficient number, since it is larger than the sum of its proper divisors (659156167547).

21224522542213 is a wasteful number, since it uses less digits than its factorization.

21224522542213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076776.

The product of its digits is 153600, while the sum is 37.

Subtracting 21224522542213 from its reverse (31224522542212), we obtain a palindrome (9999999999999).

The spelling of 21224522542213 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twenty-two million, five hundred forty-two thousand, two hundred thirteen".