20001012111023 has 16 divisors (see below), whose sum is σ = 20440469833344. Its totient is φ = 19565235432960.

The previous prime is 20001012111019. The next prime is 20001012111049. The reversal of 20001012111023 is 32011121010002.

It is a cyclic number.

It is not a de Polignac number, because 20001012111023 - 2² = 20001012111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001012110989 and 20001012111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001012111623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29065511 + ... + 29745687.

It is an arithmetic number, because the mean of its divisors is an integer number (1277529364584).

Almost surely, 2^{20001012111023} is an apocalyptic number.

20001012111023 is a deficient number, since it is larger than the sum of its proper divisors (439457722321).

20001012111023 is a wasteful number, since it uses less digits than its factorization.

20001012111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682882.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20001012111023 its reverse (32011121010002), we get a palindrome (52012133121025).

The spelling of 20001012111023 in words is "twenty trillion, one billion, twelve million, one hundred eleven thousand, twenty-three".