205221011403323 has 4 divisors (see below), whose sum is σ = 205221252539688. Its totient is φ = 205220770266960.

The previous prime is 205221011403299. The next prime is 205221011403377. The reversal of 205221011403323 is 323304110122502.

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

It is a cyclic number.

It is not a de Polignac number, because 205221011403323 - 2⁴² = 200822964892219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205221011433323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119287058 + ... + 120995223.

It is an arithmetic number, because the mean of its divisors is an integer number (51305313134922).

Almost surely, 2^{205221011403323} is an apocalyptic number.

205221011403323 is a deficient number, since it is larger than the sum of its proper divisors (241136365).

205221011403323 is an equidigital number, since it uses as much as digits as its factorization.

205221011403323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241136364.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 205221011403323 its reverse (323304110122502), we get a palindrome (528525121525825).

The spelling of 205221011403323 in words is "two hundred five trillion, two hundred twenty-one billion, eleven million, four hundred three thousand, three hundred twenty-three".