21222042533306 has 8 divisors (see below), whose sum is σ = 32930755655220. Its totient is φ = 10245123981568.

The previous prime is 21222042533299. The next prime is 21222042533311. The reversal of 21222042533306 is 60333524022212.

It can be written as a sum of positive squares in 2 ways, for example, as 19189875390625 + 2032167142681 = 4380625^2 + 1425541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21222042533306² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182948642471 + ... + 182948642586.

Almost surely, 2^{21222042533306} is an apocalyptic number.

21222042533306 is a deficient number, since it is larger than the sum of its proper divisors (11708713121914).

21222042533306 is a wasteful number, since it uses less digits than its factorization.

21222042533306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365897285088.

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 21222042533306 its reverse (60333524022212), we get a palindrome (81555566555518).

The spelling of 21222042533306 in words is "twenty-one trillion, two hundred twenty-two billion, forty-two million, five hundred thirty-three thousand, three hundred six".