20111301211 has 2 divisors, whose sum is σ = 20111301212. Its totient is φ = 20111301210.

The previous prime is 20111301187. The next prime is 20111301229. The reversal of 20111301211 is 11210311102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111301211 - 2¹³ = 20111293019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20111301191 and 20111301200.

It is not a weakly prime, because it can be changed into another prime (20111301911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055650605 + 10055650606.

It is an arithmetic number, because the mean of its divisors is an integer number (10055650606).

Almost surely, 2^20111301211 is an apocalyptic number.

20111301211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111301211 is an equidigital number, since it uses as much as digits as its factorization.

20111301211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20111301211 its reverse (11210311102), we get a palindrome (31321612313).

The spelling of 20111301211 in words is "twenty billion, one hundred eleven million, three hundred one thousand, two hundred eleven".