1211133144213 has 16 divisors (see below), whose sum is σ = 1794327374400. Its totient is φ = 807396873840.

The previous prime is 1211133144211. The next prime is 1211133144217. The reversal of 1211133144213 is 3124413311121.

1211133144213 is a `hidden beast` number, since 1 + 2 + 111 + 331 + 4 + 4 + 213 = 666.

It is not a de Polignac number, because 1211133144213 - 2¹ = 1211133144211 is a prime.

It is a super-2 number, since 2×1211133144213² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211133144211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200803 + ... + 1569263.

It is an arithmetic number, because the mean of its divisors is an integer number (112145460900).

Almost surely, 2^{1211133144213} is an apocalyptic number.

It is an amenable number.

1211133144213 is a deficient number, since it is larger than the sum of its proper divisors (583194230187).

1211133144213 is a wasteful number, since it uses less digits than its factorization.

1211133144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401249 (or 1401243 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 1211133144213 its reverse (3124413311121), we get a palindrome (4335546455334).

The spelling of 1211133144213 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, one hundred forty-four thousand, two hundred thirteen".