1234123505131 has 12 divisors (see below), whose sum is σ = 1378753892992. Its totient is φ = 1103538150000.

The previous prime is 1234123505089. The next prime is 1234123505143. The reversal of 1234123505131 is 1315053214321.

It is not a de Polignac number, because 1234123505131 - 2²³ = 1234115116523 is a prime.

It is a super-2 number, since 2×1234123505131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234123505093 and 1234123505102.

It is not an unprimeable number, because it can be changed into a prime (1234123500131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83593995 + ... + 83608756.

Almost surely, 2^{1234123505131} is an apocalyptic number.

1234123505131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1234123505131 is a deficient number, since it is larger than the sum of its proper divisors (144630387861).

1234123505131 is a wasteful number, since it uses less digits than its factorization.

1234123505131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167202834 (or 167202823 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 1234123505131 its reverse (1315053214321), we get a palindrome (2549176719452).

The spelling of 1234123505131 in words is "one trillion, two hundred thirty-four billion, one hundred twenty-three million, five hundred five thousand, one hundred thirty-one".