2211111031309 has 4 divisors (see below), whose sum is σ = 2265040568700. Its totient is φ = 2157181493920.

The previous prime is 2211111031307. The next prime is 2211111031387. The reversal of 2211111031309 is 9031301111122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 411461951209 + 1799649080100 = 641453^2 + 1341510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211111031309 - 2¹ = 2211111031307 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 (2211111031301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26964768634 + ... + 26964768715.

It is an arithmetic number, because the mean of its divisors is an integer number (566260142175).

Almost surely, 2^{2211111031309} is an apocalyptic number.

It is an amenable number.

2211111031309 is a deficient number, since it is larger than the sum of its proper divisors (53929537391).

2211111031309 is an equidigital number, since it uses as much as digits as its factorization.

2211111031309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53929537390.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 2211111031309 in words is "two trillion, two hundred eleven billion, one hundred eleven million, thirty-one thousand, three hundred nine".