20011122011 has 2 divisors, whose sum is σ = 20011122012. Its totient is φ = 20011122010.

The previous prime is 20011121987. The next prime is 20011122029. The reversal of 20011122011 is 11022111002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011122011 - 2¹⁸ = 20010859867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011121983 and 20011122001.

It is not a weakly prime, because it can be changed into another prime (20011122311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005561005 + 10005561006.

It is an arithmetic number, because the mean of its divisors is an integer number (10005561006).

Almost surely, 2^20011122011 is an apocalyptic number.

20011122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011122011 is an equidigital number, since it uses as much as digits as its factorization.

20011122011 is an evil number, because the sum of its binary digits is even.

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

Adding to 20011122011 its reverse (11022111002), we get a palindrome (31033233013).

The spelling of 20011122011 in words is "twenty billion, eleven million, one hundred twenty-two thousand, eleven".