1211323311441 has 6 divisors (see below), whose sum is σ = 1749689227650. Its totient is φ = 807548874288.

The previous prime is 1211323311437. The next prime is 1211323311479. The reversal of 1211323311441 is 1441133231121.

1211323311441 is a `hidden beast` number, since 1 + 21 + 1 + 323 + 311 + 4 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 862864499025 + 348458812416 = 928905^2 + 590304^2 .

It is not a de Polignac number, because 1211323311441 - 2² = 1211323311437 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211323311431) 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 5 ways as a sum of consecutive naturals, for example, 67295739516 + ... + 67295739533.

It is an arithmetic number, because the mean of its divisors is an integer number (291614871275).

Almost surely, 2^{1211323311441} is an apocalyptic number.

It is an amenable number.

1211323311441 is a deficient number, since it is larger than the sum of its proper divisors (538365916209).

1211323311441 is a wasteful number, since it uses less digits than its factorization.

1211323311441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134591479055 (or 134591479052 counting only the distinct ones).

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

Adding to 1211323311441 its reverse (1441133231121), we get a palindrome (2652456542562).

The spelling of 1211323311441 in words is "one trillion, two hundred eleven billion, three hundred twenty-three million, three hundred eleven thousand, four hundred forty-one".