2021231211 has 16 divisors (see below), whose sum is σ = 2759049216. Its totient is φ = 1315482336.

The previous prime is 2021231209. The next prime is 2021231231. The reversal of 2021231211 is 1121321202.

It is not a de Polignac number, because 2021231211 - 2¹ = 2021231209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021231231) 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 15 ways as a sum of consecutive naturals, for example, 460021 + ... + 464393.

It is an arithmetic number, because the mean of its divisors is an integer number (172440576).

Almost surely, 2^2021231211 is an apocalyptic number.

2021231211 is a deficient number, since it is larger than the sum of its proper divisors (737818005).

2021231211 is a wasteful number, since it uses less digits than its factorization.

2021231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8002.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2021231211 is about 44958.1050646043. The cubic root of 2021231211 is about 1264.3636414596.

Adding to 2021231211 its reverse (1121321202), we get a palindrome (3142552413).

The spelling of 2021231211 in words is "two billion, twenty-one million, two hundred thirty-one thousand, two hundred eleven".