21224222074 has 24 divisors (see below), whose sum is σ = 35113204980. Its totient is φ = 9614415360.

The previous prime is 21224222069. The next prime is 21224222111. The reversal of 21224222074 is 47022242212.

It can be written as a sum of positive squares in 2 ways, for example, as 14841330625 + 6382891449 = 121825^2 + 79893^2 .

It is a super-2 number, since 2×21224222074² (a number of 21 digits) contains 22 as substring.

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, 78759 + ... + 220570.

Almost surely, 2^21224222074 is an apocalyptic number.

21224222074 is a deficient number, since it is larger than the sum of its proper divisors (13888982906).

21224222074 is a wasteful number, since it uses less digits than its factorization.

21224222074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299646 (or 299635 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 28.

Adding to 21224222074 its reverse (47022242212), we get a palindrome (68246464286).

The spelling of 21224222074 in words is "twenty-one billion, two hundred twenty-four million, two hundred twenty-two thousand, seventy-four".