20102111201 has 8 divisors (see below), whose sum is σ = 20527036200. Its totient is φ = 19678876672.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111201 is 10211120102.

It can be written as a sum of positive squares in 4 ways, for example, as 12105280576 + 7996830625 = 110024^2 + 89425^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102111401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398570 + ... + 446163.

It is an arithmetic number, because the mean of its divisors is an integer number (2565879525).

Almost surely, 2^20102111201 is an apocalyptic number.

It is an amenable number.

20102111201 is a deficient number, since it is larger than the sum of its proper divisors (424924999).

20102111201 is an equidigital number, since it uses as much as digits as its factorization.

20102111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845235.

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

Adding to 20102111201 its reverse (10211120102), we get a palindrome (30313231303).

The spelling of 20102111201 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred one".