20011120211 has 16 divisors (see below), whose sum is σ = 20713540320. Its totient is φ = 19321739520.

The previous prime is 20011120193. The next prime is 20011120229. The reversal of 20011120211 is 11202111002.

It is an interprime number because it is at equal distance from previous prime (20011120193) and next prime (20011120229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011120211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011120192 and 20011120201.

It is not an unprimeable number, because it can be changed into a prime (20011120411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2778431 + ... + 2785623.

It is an arithmetic number, because the mean of its divisors is an integer number (1294596270).

Almost surely, 2^20011120211 is an apocalyptic number.

20011120211 is a deficient number, since it is larger than the sum of its proper divisors (702420109).

20011120211 is an equidigital number, since it uses as much as digits as its factorization.

20011120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086.

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

Adding to 20011120211 its reverse (11202111002), we get a palindrome (31213231213).

The spelling of 20011120211 in words is "twenty billion, eleven million, one hundred twenty thousand, two hundred eleven".