202120212011 has 4 divisors (see below), whose sum is σ = 202121154312. Its totient is φ = 202119269712.

The previous prime is 202120212001. The next prime is 202120212023. The reversal of 202120212011 is 110212021202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202120212011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120212001) 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, 24176 + ... + 636258.

It is an arithmetic number, because the mean of its divisors is an integer number (50530288578).

Almost surely, 2^202120212011 is an apocalyptic number.

202120212011 is a deficient number, since it is larger than the sum of its proper divisors (942301).

202120212011 is an equidigital number, since it uses as much as digits as its factorization.

202120212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942300.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202120212011 its reverse (110212021202), we get a palindrome (312332233213).

It can be divided in two parts, 20212021201 and 1, that added together give a palindrome (20212021202).

The spelling of 202120212011 in words is "two hundred two billion, one hundred twenty million, two hundred twelve thousand, eleven".