1211223323313 has 12 divisors (see below), whose sum is σ = 1750063535220. Its totient is φ = 807242799456.

The previous prime is 1211223323293. The next prime is 1211223323341. The reversal of 1211223323313 is 3133233221121.

1211223323313 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 2 + 23 + 323 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1038784947264 + 172438376049 = 1019208^2 + 415257^2 .

It is not a de Polignac number, because 1211223323313 - 2¹² = 1211223319217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211223303313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19919298 + ... + 19980011.

It is an arithmetic number, because the mean of its divisors is an integer number (145838627935).

Almost surely, 2^{1211223323313} is an apocalyptic number.

It is an amenable number.

1211223323313 is a deficient number, since it is larger than the sum of its proper divisors (538840211907).

1211223323313 is a wasteful number, since it uses less digits than its factorization.

1211223323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39902688 (or 39902685 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1211223323313 its reverse (3133233221121), we get a palindrome (4344456544434).

The spelling of 1211223323313 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, three hundred twenty-three thousand, three hundred thirteen".