221112431230205 has 16 divisors (see below), whose sum is σ = 274673306389680. Its totient is φ = 170672748331008.

The previous prime is 221112431230189. The next prime is 221112431230253. The reversal of 221112431230205 is 502032134211122.

It can be written as a sum of positive squares in 8 ways, for example, as 10227984326884 + 210884446903321 = 3198122^2 + 14521861^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112431230205 - 2⁴ = 221112431230189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524535812 + ... + 524957181.

It is an arithmetic number, because the mean of its divisors is an integer number (17167081649355).

Almost surely, 2^{221112431230205} is an apocalyptic number.

It is an amenable number.

221112431230205 is a deficient number, since it is larger than the sum of its proper divisors (53560875159475).

221112431230205 is a wasteful number, since it uses less digits than its factorization.

221112431230205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049494480.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 221112431230205 its reverse (502032134211122), we get a palindrome (723144565441327).

The spelling of 221112431230205 in words is "two hundred twenty-one trillion, one hundred twelve billion, four hundred thirty-one million, two hundred thirty thousand, two hundred five".