20100011201021 has 8 divisors (see below), whose sum is σ = 20214243484344. Its totient is φ = 19985813890560.

The previous prime is 20100011201009. The next prime is 20100011201041. The reversal of 20100011201021 is 12010211000102.

It can be written as a sum of positive squares in 4 ways, for example, as 1432124397796 + 18667886803225 = 1196714^2 + 4320635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20100011201021 - 2³⁰ = 20098937459197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100011200993 and 20100011201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100011201041) 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 7 ways as a sum of consecutive naturals, for example, 7590056 + ... + 9889841.

It is an arithmetic number, because the mean of its divisors is an integer number (2526780435543).

Almost surely, 2^{20100011201021} is an apocalyptic number.

It is an amenable number.

20100011201021 is a deficient number, since it is larger than the sum of its proper divisors (114232283323).

20100011201021 is a wasteful number, since it uses less digits than its factorization.

20100011201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17486431.

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

Adding to 20100011201021 its reverse (12010211000102), we get a palindrome (32110222201123).

The spelling of 20100011201021 in words is "twenty trillion, one hundred billion, eleven million, two hundred one thousand, twenty-one".