2123111011 has 16 divisors (see below), whose sum is σ = 2570546880. Its totient is φ = 1711825920.

The previous prime is 2123110993. The next prime is 2123111099. The reversal of 2123111011 is 1101113212.

It is a happy number.

It is not a de Polignac number, because 2123111011 - 2¹⁹ = 2122586723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123110982 and 2123111000.

It is not an unprimeable number, because it can be changed into a prime (2123111311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286825 + ... + 294133.

It is an arithmetic number, because the mean of its divisors is an integer number (160659180).

Almost surely, 2^2123111011 is an apocalyptic number.

2123111011 is a deficient number, since it is larger than the sum of its proper divisors (447435869).

2123111011 is a wasteful number, since it uses less digits than its factorization.

2123111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774.

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

The square root of 2123111011 is about 46077.2287686662. The cubic root of 2123111011 is about 1285.2597315977.

Adding to 2123111011 its reverse (1101113212), we get a palindrome (3224224223).

The spelling of 2123111011 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, eleven".