20011102211 has 8 divisors (see below), whose sum is σ = 20256460560. Its totient is φ = 19765845472.

The previous prime is 20011102171. The next prime is 20011102249. The reversal of 20011102211 is 11220111002.

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-20011102211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011102192 and 20011102201.

It is not an unprimeable number, because it can be changed into a prime (20011108211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417941 + ... + 463353.

It is an arithmetic number, because the mean of its divisors is an integer number (2532057570).

Almost surely, 2^20011102211 is an apocalyptic number.

20011102211 is a deficient number, since it is larger than the sum of its proper divisors (245358349).

20011102211 is an equidigital number, since it uses as much as digits as its factorization.

20011102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50805.

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

Adding to 20011102211 its reverse (11220111002), we get a palindrome (31231213213).

The spelling of 20011102211 in words is "twenty billion, eleven million, one hundred two thousand, two hundred eleven".