1211211333333 has 12 divisors (see below), whose sum is σ = 1750131429228. Its totient is φ = 807195477120.

The previous prime is 1211211333331. The next prime is 1211211333341. The reversal of 1211211333333 is 3333331121121.

1211211333333 is a `hidden beast` number, since 1 + 211 + 2 + 113 + 3 + 3 + 333 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 783283411089 + 427927922244 = 885033^2 + 654162^2 .

It is not a de Polignac number, because 1211211333333 - 2¹ = 1211211333331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211211333297 and 1211211333306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211211333331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23201238 + ... + 23253383.

It is an arithmetic number, because the mean of its divisors is an integer number (145844285769).

Almost surely, 2^{1211211333333} is an apocalyptic number.

It is an amenable number.

1211211333333 is a deficient number, since it is larger than the sum of its proper divisors (538920095895).

1211211333333 is a wasteful number, since it uses less digits than its factorization.

1211211333333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46457524 (or 46457521 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

Adding to 1211211333333 its reverse (3333331121121), we get a palindrome (4544542454454).

The spelling of 1211211333333 in words is "one trillion, two hundred eleven billion, two hundred eleven million, three hundred thirty-three thousand, three hundred thirty-three".