20121020110023 has 16 divisors (see below), whose sum is σ = 30672426529536. Its totient is φ = 11493291605760.

The previous prime is 20121020110007. The next prime is 20121020110073. The reversal of 20121020110023 is 32001102012102.

It is not a de Polignac number, because 20121020110023 - 2⁴ = 20121020110007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121020109984 and 20121020110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121020110073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184701393 + ... + 184810298.

It is an arithmetic number, because the mean of its divisors is an integer number (1917026658096).

Almost surely, 2^{20121020110023} is an apocalyptic number.

20121020110023 is a deficient number, since it is larger than the sum of its proper divisors (10551406419513).

20121020110023 is a wasteful number, since it uses less digits than its factorization.

20121020110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369514294.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20121020110023 its reverse (32001102012102), we get a palindrome (52122122122125).

The spelling of 20121020110023 in words is "twenty trillion, one hundred twenty-one billion, twenty million, one hundred ten thousand, twenty-three".