21222042414565 has 16 divisors (see below), whose sum is σ = 25905740319360. Its totient is φ = 16685243277120.

The previous prime is 21222042414541. The next prime is 21222042414583. The reversal of 21222042414565 is 56541424022212.

It is not a de Polignac number, because 21222042414565 - 2¹⁹ = 21222041890277 is a prime.

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, 28947345 + ... + 29671414.

It is an arithmetic number, because the mean of its divisors is an integer number (1619108769960).

Almost surely, 2^{21222042414565} is an apocalyptic number.

It is an amenable number.

21222042414565 is a deficient number, since it is larger than the sum of its proper divisors (4683697904795).

21222042414565 is a wasteful number, since it uses less digits than its factorization.

21222042414565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58620012.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 21222042414565 its reverse (56541424022212), we get a palindrome (77763466436777).

The spelling of 21222042414565 in words is "twenty-one trillion, two hundred twenty-two billion, forty-two million, four hundred fourteen thousand, five hundred sixty-five".