221212321002329 has 4 divisors (see below), whose sum is σ = 221212371682020. Its totient is φ = 221212270322640.

The previous prime is 221212321002269. The next prime is 221212321002331. The reversal of 221212321002329 is 923200123212122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188137434342400 + 33074886659929 = 13716320^2 + 5751077^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212321002329 - 2²⁴ = 221212304225113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221212321002295 and 221212321002304.

It is not an unprimeable number, because it can be changed into a prime (221212321002349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18103682 + ... + 27751899.

It is an arithmetic number, because the mean of its divisors is an integer number (55303092920505).

Almost surely, 2^{221212321002329} is an apocalyptic number.

It is an amenable number.

221212321002329 is a deficient number, since it is larger than the sum of its proper divisors (50679691).

221212321002329 is an equidigital number, since it uses as much as digits as its factorization.

221212321002329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50679690.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 221212321002329 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, two thousand, three hundred twenty-nine".