20001012111020 has 48 divisors (see below), whose sum is σ = 42029605244928. Its totient is φ = 7995171787200.

The previous prime is 20001012111019. The next prime is 20001012111049. The reversal of 20001012111020 is 2011121010002.

It is a junction number, because it is equal to n+sod(n) for n = 20001012110992 and 20001012111010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309279209 + ... + 309343871.

It is an arithmetic number, because the mean of its divisors is an integer number (875616775936).

Almost surely, 2^{20001012111020} is an apocalyptic number.

20001012111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001012111020 is an abundant number, since it is smaller than the sum of its proper divisors (22028593133908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001012111020 is a wasteful number, since it uses less digits than its factorization.

20001012111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74550 (or 74548 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001012111020 its reverse (2011121010002), we get a palindrome (22012133121022).

The spelling of 20001012111020 in words is "twenty trillion, one billion, twelve million, one hundred eleven thousand, twenty".