20123110011 has 16 divisors (see below), whose sum is σ = 27851074560. Its totient is φ = 12910112160.

The previous prime is 20123109961. The next prime is 20123110039. The reversal of 20123110011 is 11001132102.

It is not a de Polignac number, because 20123110011 - 2¹³ = 20123101819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20123110061) 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, 587760 + ... + 621053.

It is an arithmetic number, because the mean of its divisors is an integer number (1740692160).

Almost surely, 2^20123110011 is an apocalyptic number.

20123110011 is a deficient number, since it is larger than the sum of its proper divisors (7727964549).

20123110011 is a wasteful number, since it uses less digits than its factorization.

20123110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209026.

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

Adding to 20123110011 its reverse (11001132102), we get a palindrome (31124242113).

The spelling of 20123110011 in words is "twenty billion, one hundred twenty-three million, one hundred ten thousand, eleven".