20210220111011 has 32 divisors (see below), whose sum is σ = 24403462410240. Its totient is φ = 16369010896896.

The previous prime is 20210220111001. The next prime is 20210220111017. The reversal of 20210220111011 is 11011102201202.

It is not a de Polignac number, because 20210220111011 - 2¹⁰ = 20210220109987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210220111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252767906 + ... + 252847848.

It is an arithmetic number, because the mean of its divisors is an integer number (762608200320).

Almost surely, 2^{20210220111011} is an apocalyptic number.

20210220111011 is a deficient number, since it is larger than the sum of its proper divisors (4193242299229).

20210220111011 is a wasteful number, since it uses less digits than its factorization.

20210220111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106523.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20210220111011 its reverse (11011102201202), we get a palindrome (31221322312213).

The spelling of 20210220111011 in words is "twenty trillion, two hundred ten billion, two hundred twenty million, one hundred eleven thousand, eleven".