1231423405105 has 8 divisors (see below), whose sum is σ = 1478082497472. Its totient is φ = 984889116528.

The previous prime is 1231423405067. The next prime is 1231423405141. The reversal of 1231423405105 is 5015043241321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231423405105 - 2⁹ = 1231423404593 is a prime.

It is a super-2 number, since 2×1231423405105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31179237 + ... + 31218706.

It is an arithmetic number, because the mean of its divisors is an integer number (184760312184).

Almost surely, 2^{1231423405105} is an apocalyptic number.

It is an amenable number.

1231423405105 is a deficient number, since it is larger than the sum of its proper divisors (246659092367).

1231423405105 is an equidigital number, since it uses as much as digits as its factorization.

1231423405105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62401895.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1231423405105 its reverse (5015043241321), we get a palindrome (6246466646426).

The spelling of 1231423405105 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-three million, four hundred five thousand, one hundred five".