20001102001211 has 8 divisors (see below), whose sum is σ = 20036645184720. Its totient is φ = 19965560193792.

The previous prime is 20001102001087. The next prime is 20001102001213. The reversal of 20001102001211 is 11210020110002.

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-20001102001211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001102001192 and 20001102001201.

It is not an unprimeable number, because it can be changed into a prime (20001102001213) 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, 31339256 + ... + 31971098.

It is an arithmetic number, because the mean of its divisors is an integer number (2504580648090).

Almost surely, 2^{20001102001211} is an apocalyptic number.

20001102001211 is a deficient number, since it is larger than the sum of its proper divisors (35543183509).

20001102001211 is an equidigital number, since it uses as much as digits as its factorization.

20001102001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688045.

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

Adding to 20001102001211 its reverse (11210020110002), we get a palindrome (31211122111213).

The spelling of 20001102001211 in words is "twenty trillion, one billion, one hundred two million, one thousand, two hundred eleven".