202121020011 has 4 divisors (see below), whose sum is σ = 269494693352. Its totient is φ = 134747346672.

The previous prime is 202121019977. The next prime is 202121020043. The reversal of 202121020011 is 110020121202.

202121020011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 202121020011 - 2¹³ = 202121011819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121020091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33686836666 + ... + 33686836671.

It is an arithmetic number, because the mean of its divisors is an integer number (67373673338).

Almost surely, 2^202121020011 is an apocalyptic number.

202121020011 is a deficient number, since it is larger than the sum of its proper divisors (67373673341).

202121020011 is an equidigital number, since it uses as much as digits as its factorization.

202121020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373673340.

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

Adding to 202121020011 its reverse (110020121202), we get a palindrome (312141141213).

The spelling of 202121020011 in words is "two hundred two billion, one hundred twenty-one million, twenty thousand, eleven".