2111120999909 has 2 divisors, whose sum is σ = 2111120999910. Its totient is φ = 2111120999908.

The previous prime is 2111120999899. The next prime is 2111121000049. The reversal of 2111120999909 is 9099990211112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1797181548100 + 313939451809 = 1340590^2 + 560303^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111120999909 - 2²⁴ = 2111104222693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111120999809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055560499954 + 1055560499955.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560499955).

Almost surely, 2^{2111120999909} is an apocalyptic number.

It is an amenable number.

2111120999909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111120999909 is an equidigital number, since it uses as much as digits as its factorization.

2111120999909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 53.

The spelling of 2111120999909 in words is "two trillion, one hundred eleven billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred nine".