2131212199999 has 4 divisors (see below), whose sum is σ = 2131215143400. Its totient is φ = 2131209256600.

The previous prime is 2131212199981. The next prime is 2131212200011. The reversal of 2131212199999 is 9999912121312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2131212199999 - 2²³ = 2131203811391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131212199939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456477 + ... + 2114425.

It is an arithmetic number, because the mean of its divisors is an integer number (532803785850).

Almost surely, 2^{2131212199999} is an apocalyptic number.

2131212199999 is a deficient number, since it is larger than the sum of its proper divisors (2943401).

2131212199999 is a wasteful number, since it uses less digits than its factorization.

2131212199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943400.

The product of its digits is 1417176, while the sum is 58.

The spelling of 2131212199999 in words is "two trillion, one hundred thirty-one billion, two hundred twelve million, one hundred ninety-nine thousand, nine hundred ninety-nine".