20202111011 has 2 divisors, whose sum is σ = 20202111012. Its totient is φ = 20202111010.

The previous prime is 20202110989. The next prime is 20202111023. The reversal of 20202111011 is 11011120202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202111011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202110983 and 20202111001.

It is not a weakly prime, because it can be changed into another prime (20202111911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101055505 + 10101055506.

It is an arithmetic number, because the mean of its divisors is an integer number (10101055506).

Almost surely, 2^20202111011 is an apocalyptic number.

20202111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202111011 is an equidigital number, since it uses as much as digits as its factorization.

20202111011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20202111011 its reverse (11011120202), we get a palindrome (31213231213).

The spelling of 20202111011 in words is "twenty billion, two hundred two million, one hundred eleven thousand, eleven".