20001021201092 has 12 divisors (see below), whose sum is σ = 35003202460716. Its totient is φ = 10000106212320.

The previous prime is 20001021201061. The next prime is 20001021201103. The reversal of 20001021201092 is 29010212010002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6837722929216 + 13163298271876 = 2614904^2 + 3628126^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100985759 + ... + 101183622.

It is an arithmetic number, because the mean of its divisors is an integer number (2916933538393).

Almost surely, 2^{20001021201092} is an apocalyptic number.

It is an amenable number.

20001021201092 is a deficient number, since it is larger than the sum of its proper divisors (15002181259624).

20001021201092 is a wasteful number, since it uses less digits than its factorization.

20001021201092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202194118 (or 202194116 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20001021201092 its reverse (29010212010002), we get a palindrome (49011233211094).

The spelling of 20001021201092 in words is "twenty trillion, one billion, twenty-one million, two hundred one thousand, ninety-two".