21222123313 has 32 divisors (see below), whose sum is σ = 22696630272. Its totient is φ = 19813248000.

The previous prime is 21222123289. The next prime is 21222123317. The reversal of 21222123313 is 31332122212.

It is a cyclic number.

It is not a de Polignac number, because 21222123313 - 2²⁵ = 21188568881 is a prime.

It is a super-3 number, since 3×21222123313³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222123317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28034131 + ... + 28034887.

It is an arithmetic number, because the mean of its divisors is an integer number (709269696).

Almost surely, 2^21222123313 is an apocalyptic number.

It is an amenable number.

21222123313 is a deficient number, since it is larger than the sum of its proper divisors (1474506959).

21222123313 is a wasteful number, since it uses less digits than its factorization.

21222123313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its digits is 864, while the sum is 22.

Adding to 21222123313 its reverse (31332122212), we get a palindrome (52554245525).

The spelling of 21222123313 in words is "twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, three hundred thirteen".