1321230034205 has 16 divisors (see below), whose sum is σ = 1586295300144. Its totient is φ = 1056438028800.

The previous prime is 1321230034171. The next prime is 1321230034247. The reversal of 1321230034205 is 5024300321231.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 162156014596 + 1159074019609 = 402686^2 + 1076603^2 .

It is not a de Polignac number, because 1321230034205 - 2¹⁸ = 1321229772061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104844905 + ... + 104857505.

It is an arithmetic number, because the mean of its divisors is an integer number (99143456259).

Almost surely, 2^{1321230034205} is an apocalyptic number.

It is an amenable number.

1321230034205 is a deficient number, since it is larger than the sum of its proper divisors (265065265939).

1321230034205 is a wasteful number, since it uses less digits than its factorization.

1321230034205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21776.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1321230034205 its reverse (5024300321231), we get a palindrome (6345530355436).

The spelling of 1321230034205 in words is "one trillion, three hundred twenty-one billion, two hundred thirty million, thirty-four thousand, two hundred five".