1223353311205 has 4 divisors (see below), whose sum is σ = 1468023973452. Its totient is φ = 978682648960.

The previous prime is 1223353311197. The next prime is 1223353311233. The reversal of 1223353311205 is 5021133533221.

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 155714684449 + 1067638626756 = 394607^2 + 1033266^2 .

It is not a de Polignac number, because 1223353311205 - 2³ = 1223353311197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122335331116 + ... + 122335331125.

It is an arithmetic number, because the mean of its divisors is an integer number (367005993363).

Almost surely, 2^{1223353311205} is an apocalyptic number.

It is an amenable number.

1223353311205 is a deficient number, since it is larger than the sum of its proper divisors (244670662247).

1223353311205 is an equidigital number, since it uses as much as digits as its factorization.

1223353311205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244670662246.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 1223353311205 its reverse (5021133533221), we get a palindrome (6244486844426).

The spelling of 1223353311205 in words is "one trillion, two hundred twenty-three billion, three hundred fifty-three million, three hundred eleven thousand, two hundred five".