1231244343123 has 16 divisors (see below), whose sum is σ = 1698296613120. Its totient is φ = 792511769504.

The previous prime is 1231244343107. The next prime is 1231244343137. The reversal of 1231244343123 is 3213434421321.

It is a cyclic number.

It is not a de Polignac number, because 1231244343123 - 2⁴ = 1231244343107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231244343023) 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, 10157290 + ... + 10277792.

It is an arithmetic number, because the mean of its divisors is an integer number (106143538320).

Almost surely, 2^{1231244343123} is an apocalyptic number.

1231244343123 is a deficient number, since it is larger than the sum of its proper divisors (467052269997).

1231244343123 is a wasteful number, since it uses less digits than its factorization.

1231244343123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237978.

The product of its digits is 41472, while the sum is 33.

Adding to 1231244343123 its reverse (3213434421321), we get a palindrome (4444678764444).

The spelling of 1231244343123 in words is "one trillion, two hundred thirty-one billion, two hundred forty-four million, three hundred forty-three thousand, one hundred twenty-three".