20110000102021 has 4 divisors (see below), whose sum is σ = 20127441560332. Its totient is φ = 20092558643712.

The previous prime is 20110000102013. The next prime is 20110000102037. The reversal of 20110000102021 is 12020100001102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15377574030625 + 4732426071396 = 3921425^2 + 2175414^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110000102021 - 2³ = 20110000102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110000101989 and 20110000102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110000102421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8720727426 + ... + 8720729731.

It is an arithmetic number, because the mean of its divisors is an integer number (5031860390083).

Almost surely, 2^{20110000102021} is an apocalyptic number.

It is an amenable number.

20110000102021 is a deficient number, since it is larger than the sum of its proper divisors (17441458311).

20110000102021 is a wasteful number, since it uses less digits than its factorization.

20110000102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17441458310.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20110000102021 its reverse (12020100001102), we get a palindrome (32130100103123).

The spelling of 20110000102021 in words is "twenty trillion, one hundred ten billion, one hundred two thousand, twenty-one".