20111233211 has 2 divisors, whose sum is σ = 20111233212. Its totient is φ = 20111233210.

The previous prime is 20111233201. The next prime is 20111233217. The reversal of 20111233211 is 11233211102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111233211 - 2³⁴ = 2931364027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20111233211.

It is not a weakly prime, because it can be changed into another prime (20111233217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055616605 + 10055616606.

It is an arithmetic number, because the mean of its divisors is an integer number (10055616606).

Almost surely, 2^20111233211 is an apocalyptic number.

20111233211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111233211 is an equidigital number, since it uses as much as digits as its factorization.

20111233211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20111233211 its reverse (11233211102), we get a palindrome (31344444313).

The spelling of 20111233211 in words is "twenty billion, one hundred eleven million, two hundred thirty-three thousand, two hundred eleven".