20111011011023 has 4 divisors (see below), whose sum is σ = 20176519190520. Its totient is φ = 20045502831528.

The previous prime is 20111011010983. The next prime is 20111011011037. The reversal of 20111011011023 is 32011011011102.

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 20111011011023 - 2²⁴ = 20110994233807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111011010989 and 20111011011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111011091023) 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, 32754089288 + ... + 32754089901.

It is an arithmetic number, because the mean of its divisors is an integer number (5044129797630).

Almost surely, 2^{20111011011023} is an apocalyptic number.

20111011011023 is a deficient number, since it is larger than the sum of its proper divisors (65508179497).

20111011011023 is an equidigital number, since it uses as much as digits as its factorization.

20111011011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65508179496.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20111011011023 its reverse (32011011011102), we get a palindrome (52122022022125).

The spelling of 20111011011023 in words is "twenty trillion, one hundred eleven billion, eleven million, eleven thousand, twenty-three".