202020120111 has 4 divisors (see below), whose sum is σ = 269360160152. Its totient is φ = 134680080072.

The previous prime is 202020120103. The next prime is 202020120121. The reversal of 202020120111 is 111021020202.

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

It is not a de Polignac number, because 202020120111 - 2³ = 202020120103 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 (202020120121) 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, 33670020016 + ... + 33670020021.

It is an arithmetic number, because the mean of its divisors is an integer number (67340040038).

Almost surely, 2^202020120111 is an apocalyptic number.

202020120111 is a deficient number, since it is larger than the sum of its proper divisors (67340040041).

202020120111 is an equidigital number, since it uses as much as digits as its factorization.

202020120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67340040040.

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

Adding to 202020120111 its reverse (111021020202), we get a palindrome (313041140313).

Subtracting from 202020120111 its reverse (111021020202), we obtain a palindrome (90999099909).

The spelling of 202020120111 in words is "two hundred two billion, twenty million, one hundred twenty thousand, one hundred eleven".