20001021201112 has 16 divisors (see below), whose sum is σ = 42859331145360. Its totient is φ = 8571866229024.

The previous prime is 20001021201103. The next prime is 20001021201131. The reversal of 20001021201112 is 21110212010002.

It is a super-2 number, since 2×20001021201112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001021201092 and 20001021201101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178580546383 + ... + 178580546494.

It is an arithmetic number, because the mean of its divisors is an integer number (2678708196585).

Almost surely, 2^{20001021201112} is an apocalyptic number.

It is an amenable number.

20001021201112 is an abundant number, since it is smaller than the sum of its proper divisors (22858309944248).

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

20001021201112 is a wasteful number, since it uses less digits than its factorization.

20001021201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357161092890 (or 357161092886 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001021201112 its reverse (21110212010002), we get a palindrome (41111233211114).

The spelling of 20001021201112 in words is "twenty trillion, one billion, twenty-one million, two hundred one thousand, one hundred twelve".