11311442123121 has 96 divisors (see below), whose sum is σ = 19593335623680. Its totient is φ = 6154811163648.

The previous prime is 11311442123083. The next prime is 11311442123227. The reversal of 11311442123121 is 12132124411311.

11311442123121 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 1 + 4 + 421 + 231 + 2 + 1 = 666.

It is not a de Polignac number, because 11311442123121 - 2⁹ = 11311442122609 is a prime.

It is a super-2 number, since 2×11311442123121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11311442121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16612050 + ... + 17279556.

It is an arithmetic number, because the mean of its divisors is an integer number (204097246080).

Almost surely, 2^{11311442123121} is an apocalyptic number.

It is an amenable number.

11311442123121 is a deficient number, since it is larger than the sum of its proper divisors (8281893500559).

11311442123121 is a wasteful number, since it uses less digits than its factorization.

11311442123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667723 (or 667720 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 11311442123121 its reverse (12132124411311), we get a palindrome (23443566534432).

The spelling of 11311442123121 in words is "eleven trillion, three hundred eleven billion, four hundred forty-two million, one hundred twenty-three thousand, one hundred twenty-one".