2112131040209 has 2 divisors, whose sum is σ = 2112131040210. Its totient is φ = 2112131040208.

The previous prime is 2112131040193. The next prime is 2112131040247. The reversal of 2112131040209 is 9020401312112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092384509584 + 1019746530625 = 1045172^2 + 1009825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112131040209 - 2⁴ = 2112131040193 is a prime.

It is a super-2 number, since 2×2112131040209² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112131040259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056065520104 + 1056065520105.

It is an arithmetic number, because the mean of its divisors is an integer number (1056065520105).

Almost surely, 2^{2112131040209} is an apocalyptic number.

It is an amenable number.

2112131040209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112131040209 is an equidigital number, since it uses as much as digits as its factorization.

2112131040209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 2112131040209 in words is "two trillion, one hundred twelve billion, one hundred thirty-one million, forty thousand, two hundred nine".