2111385511 has 4 divisors (see below), whose sum is σ = 2120220000. Its totient is φ = 2102551024.

The previous prime is 2111385503. The next prime is 2111385547. The reversal of 2111385511 is 1155831112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111385511 - 2³ = 2111385503 is a prime.

It is a super-2 number, since 2×2111385511² = 8915897552121462242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111385511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111385611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4416886 + ... + 4417363.

It is an arithmetic number, because the mean of its divisors is an integer number (530055000).

Almost surely, 2^2111385511 is an apocalyptic number.

2111385511 is a deficient number, since it is larger than the sum of its proper divisors (8834489).

2111385511 is an equidigital number, since it uses as much as digits as its factorization.

2111385511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834488.

The product of its digits is 1200, while the sum is 28.

The square root of 2111385511 is about 45949.8151356455. The cubic root of 2111385511 is about 1282.8892884536.

The spelling of 2111385511 in words is "two billion, one hundred eleven million, three hundred eighty-five thousand, five hundred eleven".