20001201122011 has 4 divisors (see below), whose sum is σ = 20005368912000. Its totient is φ = 19997033332024.

The previous prime is 20001201121961. The next prime is 20001201122029. The reversal of 20001201122011 is 11022110210002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001201122011 - 2⁷ = 20001201121883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001201121982 and 20001201122000.

It is not an unprimeable number, because it can be changed into a prime (20001201122411) 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, 2083887796 + ... + 2083897393.

It is an arithmetic number, because the mean of its divisors is an integer number (5001342228000).

Almost surely, 2^{20001201122011} is an apocalyptic number.

20001201122011 is a deficient number, since it is larger than the sum of its proper divisors (4167789989).

20001201122011 is an equidigital number, since it uses as much as digits as its factorization.

20001201122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167789988.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001201122011 its reverse (11022110210002), we get a palindrome (31023311332013).

The spelling of 20001201122011 in words is "twenty trillion, one billion, two hundred one million, one hundred twenty-two thousand, eleven".