2100111969289 has 2 divisors, whose sum is σ = 2100111969290. Its totient is φ = 2100111969288.

The previous prime is 2100111969287. The next prime is 2100111969343. The reversal of 2100111969289 is 9829691110012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454756813689 + 645355155600 = 1206133^2 + 803340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100111969289 - 2¹ = 2100111969287 is a prime.

Together with 2100111969287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2100111969287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050055984644 + 1050055984645.

It is an arithmetic number, because the mean of its divisors is an integer number (1050055984645).

Almost surely, 2^{2100111969289} is an apocalyptic number.

It is an amenable number.

2100111969289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100111969289 is an equidigital number, since it uses as much as digits as its factorization.

2100111969289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 49.

The spelling of 2100111969289 in words is "two trillion, one hundred billion, one hundred eleven million, nine hundred sixty-nine thousand, two hundred eighty-nine".