2112909926399 has 4 divisors (see below), whose sum is σ = 2119792369464. Its totient is φ = 2106027483336.

The previous prime is 2112909926389. The next prime is 2112909926443. The reversal of 2112909926399 is 9936299092112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112909926399 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 (2112909926339) 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, 3441221072 + ... + 3441221685.

It is an arithmetic number, because the mean of its divisors is an integer number (529948092366).

Almost surely, 2^{2112909926399} is an apocalyptic number.

2112909926399 is a deficient number, since it is larger than the sum of its proper divisors (6882443065).

2112909926399 is an equidigital number, since it uses as much as digits as its factorization.

2112909926399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882443064.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The spelling of 2112909926399 in words is "two trillion, one hundred twelve billion, nine hundred nine million, nine hundred twenty-six thousand, three hundred ninety-nine".