2131204312405 has 16 divisors (see below), whose sum is σ = 2933579718144. Its totient is φ = 1456004626560.

The previous prime is 2131204312261. The next prime is 2131204312411. The reversal of 2131204312405 is 5042134021312.

It is not a de Polignac number, because 2131204312405 - 2²⁷ = 2131070094677 is a prime.

It is a Duffinian number.

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, 112336552 + ... + 112355521.

It is an arithmetic number, because the mean of its divisors is an integer number (183348732384).

Almost surely, 2^{2131204312405} is an apocalyptic number.

It is an amenable number.

2131204312405 is a deficient number, since it is larger than the sum of its proper divisors (802375405739).

2131204312405 is a wasteful number, since it uses less digits than its factorization.

2131204312405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224692356.

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

Adding to 2131204312405 its reverse (5042134021312), we get a palindrome (7173338333717).

The spelling of 2131204312405 in words is "two trillion, one hundred thirty-one billion, two hundred four million, three hundred twelve thousand, four hundred five".