2111869043 has 2 divisors, whose sum is σ = 2111869044. Its totient is φ = 2111869042.

The previous prime is 2111869037. The next prime is 2111869061. The reversal of 2111869043 is 3409681112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111869043 - 2⁴ = 2111869027 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111868994 and 2111869012.

It is not a weakly prime, because it can be changed into another prime (2111869003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055934521 + 1055934522.

It is an arithmetic number, because the mean of its divisors is an integer number (1055934522).

Almost surely, 2^2111869043 is an apocalyptic number.

2111869043 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111869043 is an equidigital number, since it uses as much as digits as its factorization.

2111869043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2111869043 is about 45955.0763572426. The cubic root of 2111869043 is about 1282.9872132006.

The spelling of 2111869043 in words is "two billion, one hundred eleven million, eight hundred sixty-nine thousand, forty-three".