2102021211 has 4 divisors (see below), whose sum is σ = 2802694952. Its totient is φ = 1401347472.

The previous prime is 2102021209. The next prime is 2102021227. The reversal of 2102021211 is 1121202012.

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

It is not a de Polignac number, because 2102021211 - 2¹ = 2102021209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350336866 + ... + 350336871.

It is an arithmetic number, because the mean of its divisors is an integer number (700673738).

Almost surely, 2^2102021211 is an apocalyptic number.

2102021211 is a deficient number, since it is larger than the sum of its proper divisors (700673741).

2102021211 is an equidigital number, since it uses as much as digits as its factorization.

2102021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700673740.

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

The square root of 2102021211 is about 45847.8048656640. The cubic root of 2102021211 is about 1280.9898778026.

Adding to 2102021211 its reverse (1121202012), we get a palindrome (3223223223).

The spelling of 2102021211 in words is "two billion, one hundred two million, twenty-one thousand, two hundred eleven".