1231011133143 has 32 divisors (see below), whose sum is σ = 1879649280000. Its totient is φ = 709763330400.

The previous prime is 1231011133091. The next prime is 1231011133147. The reversal of 1231011133143 is 3413311101321.

It is not a de Polignac number, because 1231011133143 - 2¹⁷ = 1231011002071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231011133147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10137393 + ... + 10258106.

It is an arithmetic number, because the mean of its divisors is an integer number (58739040000).

Almost surely, 2^{1231011133143} is an apocalyptic number.

1231011133143 is a deficient number, since it is larger than the sum of its proper divisors (648638146857).

1231011133143 is a wasteful number, since it uses less digits than its factorization.

1231011133143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20395603.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 1231011133143 its reverse (3413311101321), we get a palindrome (4644322234464).

The spelling of 1231011133143 in words is "one trillion, two hundred thirty-one billion, eleven million, one hundred thirty-three thousand, one hundred forty-three".