202120110011 has 4 divisors (see below), whose sum is σ = 202809940032. Its totient is φ = 201430279992.

The previous prime is 202120110007. The next prime is 202120110061. The reversal of 202120110011 is 110011021202.

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

It is a cyclic number.

It is not a de Polignac number, because 202120110011 - 2² = 202120110007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202120109974 and 202120110001.

It is not an unprimeable number, because it can be changed into a prime (202120110001) 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 3 ways as a sum of consecutive naturals, for example, 344914571 + ... + 344915156.

It is an arithmetic number, because the mean of its divisors is an integer number (50702485008).

Almost surely, 2^202120110011 is an apocalyptic number.

202120110011 is a deficient number, since it is larger than the sum of its proper divisors (689830021).

202120110011 is an equidigital number, since it uses as much as digits as its factorization.

202120110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689830020.

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

Adding to 202120110011 its reverse (110011021202), we get a palindrome (312131131213).

The spelling of 202120110011 in words is "two hundred two billion, one hundred twenty million, one hundred ten thousand, eleven".