20102111112001 has 4 divisors (see below), whose sum is σ = 20120107631572. Its totient is φ = 20084114592432.

The previous prime is 20102111111993. The next prime is 20102111112059. The reversal of 20102111112001 is 10021111120102.

It is a happy number.

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 666180807601 + 19435930304400 = 816199^2 + 4408620^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102111112001 - 2³ = 20102111111993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102111112901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998258110 + ... + 8998260343.

It is an arithmetic number, because the mean of its divisors is an integer number (5030026907893).

Almost surely, 2^{20102111112001} is an apocalyptic number.

It is an amenable number.

20102111112001 is a deficient number, since it is larger than the sum of its proper divisors (17996519571).

20102111112001 is a wasteful number, since it uses less digits than its factorization.

20102111112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17996519570.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20102111112001 its reverse (10021111120102), we get a palindrome (30123222232103).

The spelling of 20102111112001 in words is "twenty trillion, one hundred two billion, one hundred eleven million, one hundred twelve thousand, one".