20011200211001 has 8 divisors (see below), whose sum is σ = 20890586937024. Its totient is φ = 19132591363600.

The previous prime is 20011200210979. The next prime is 20011200211019. The reversal of 20011200211001 is 10011200211002.

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-20011200211001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20011200211021) 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, 194417075 + ... + 194519976.

It is an arithmetic number, because the mean of its divisors is an integer number (2611323367128).

Almost surely, 2^{20011200211001} is an apocalyptic number.

It is an amenable number.

20011200211001 is a deficient number, since it is larger than the sum of its proper divisors (879386726023).

20011200211001 is a wasteful number, since it uses less digits than its factorization.

20011200211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388939311.

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

Adding to 20011200211001 its reverse (10011200211002), we get a palindrome (30022400422003).

Subtracting from 20011200211001 its reverse (10011200211002), we obtain a palindrome (9999999999999).

The spelling of 20011200211001 in words is "twenty trillion, eleven billion, two hundred million, two hundred eleven thousand, one".