20210220111 has 4 divisors (see below), whose sum is σ = 26946960152. Its totient is φ = 13473480072.

The previous prime is 20210220097. The next prime is 20210220119. The reversal of 20210220111 is 11102201202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20210220111 - 2¹⁸ = 20209957967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210220119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368370016 + ... + 3368370021.

It is an arithmetic number, because the mean of its divisors is an integer number (6736740038).

Almost surely, 2^20210220111 is an apocalyptic number.

20210220111 is a deficient number, since it is larger than the sum of its proper divisors (6736740041).

20210220111 is an equidigital number, since it uses as much as digits as its factorization.

20210220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736740040.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20210220111 its reverse (11102201202), we get a palindrome (31312421313).

The spelling of 20210220111 in words is "twenty billion, two hundred ten million, two hundred twenty thousand, one hundred eleven".