21222365562 has 24 divisors (see below), whose sum is σ = 46179147924. Its totient is φ = 7043759424.

The previous prime is 21222365551. The next prime is 21222365587. The reversal of 21222365562 is 26556322212.

21222365562 is a `hidden beast` number, since 2 + 12 + 2 + 23 + 65 + 562 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20851071201 + 371294361 = 144399^2 + 19269^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2525893 + ... + 2534280.

Almost surely, 2^21222365562 is an apocalyptic number.

21222365562 is an abundant number, since it is smaller than the sum of its proper divisors (24956782362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222365562 is a wasteful number, since it uses less digits than its factorization.

21222365562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060414 (or 5060411 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 21222365562 its reverse (26556322212), we get a palindrome (47778687774).

The spelling of 21222365562 in words is "twenty-one billion, two hundred twenty-two million, three hundred sixty-five thousand, five hundred sixty-two".