13221312221999 has 16 divisors (see below), whose sum is σ = 15367289414400. Its totient is φ = 11139667491264.

The previous prime is 13221312221989. The next prime is 13221312222011. The reversal of 13221312221999 is 99912221312231.

13221312221999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13221312221999 - 2⁴ = 13221312221983 is a prime.

It is a super-3 number, since 3×13221312221999³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221312221969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4568819 + ... + 6878715.

It is an arithmetic number, because the mean of its divisors is an integer number (960455588400).

Almost surely, 2^{13221312221999} is an apocalyptic number.

13221312221999 is a deficient number, since it is larger than the sum of its proper divisors (2145977192401).

13221312221999 is a wasteful number, since it uses less digits than its factorization.

13221312221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323822.

The product of its digits is 209952, while the sum is 47.

The spelling of 13221312221999 in words is "thirteen trillion, two hundred twenty-one billion, three hundred twelve million, two hundred twenty-one thousand, nine hundred ninety-nine".