202120001211 has 4 divisors (see below), whose sum is σ = 269493334952. Its totient is φ = 134746667472.

The previous prime is 202120001191. The next prime is 202120001287. The reversal of 202120001211 is 112100021202.

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

It is not a de Polignac number, because 202120001211 - 2⁹ = 202120000699 is a prime.

It is a super-3 number, since 3×202120001211³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120001411) 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, 33686666866 + ... + 33686666871.

It is an arithmetic number, because the mean of its divisors is an integer number (67373333738).

Almost surely, 2^202120001211 is an apocalyptic number.

202120001211 is a deficient number, since it is larger than the sum of its proper divisors (67373333741).

202120001211 is an equidigital number, since it uses as much as digits as its factorization.

202120001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373333740.

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

Adding to 202120001211 its reverse (112100021202), we get a palindrome (314220022413).

The spelling of 202120001211 in words is "two hundred two billion, one hundred twenty million, one thousand, two hundred eleven".