2111123011 has 8 divisors (see below), whose sum is σ = 2229454080. Its totient is φ = 1995003912.

The previous prime is 2111122999. The next prime is 2111123051. The reversal of 2111123011 is 1103211112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111123011 - 2⁹ = 2111122499 is a prime.

It is a super-2 number, since 2×2111123011² = 8913680735147412242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111122982 and 2111123000.

It is not an unprimeable number, because it can be changed into a prime (2111123051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551031 + ... + 554848.

It is an arithmetic number, because the mean of its divisors is an integer number (278681760).

Almost surely, 2^2111123011 is an apocalyptic number.

2111123011 is a deficient number, since it is larger than the sum of its proper divisors (118331069).

2111123011 is a wasteful number, since it uses less digits than its factorization.

2111123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105985.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2111123011 is about 45946.9586697531. The cubic root of 2111123011 is about 1282.8361207756.

Adding to 2111123011 its reverse (1103211112), we get a palindrome (3214334123).

The spelling of 2111123011 in words is "two billion, one hundred eleven million, one hundred twenty-three thousand, eleven".