1231400404135 has 16 divisors (see below), whose sum is σ = 1624320542592. Its totient is φ = 888727559200.

The previous prime is 1231400404123. The next prime is 1231400404211. The reversal of 1231400404135 is 5314040041321.

It is not a de Polignac number, because 1231400404135 - 2²⁷ = 1231266186407 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85447369 + ... + 85461778.

It is an arithmetic number, because the mean of its divisors is an integer number (101520033912).

Almost surely, 2^{1231400404135} is an apocalyptic number.

1231400404135 is a deficient number, since it is larger than the sum of its proper divisors (392920138457).

1231400404135 is a wasteful number, since it uses less digits than its factorization.

1231400404135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170909294.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1231400404135 its reverse (5314040041321), we get a palindrome (6545440445456).

The spelling of 1231400404135 in words is "one trillion, two hundred thirty-one billion, four hundred million, four hundred four thousand, one hundred thirty-five".