2152421211 has 16 divisors (see below), whose sum is σ = 2888939520. Its totient is φ = 1425446880.

The previous prime is 2152421207. The next prime is 2152421237. The reversal of 2152421211 is 1121242512.

It is not a de Polignac number, because 2152421211 - 2² = 2152421207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2152421291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490021 + ... + 494393.

It is an arithmetic number, because the mean of its divisors is an integer number (180558720).

Almost surely, 2^2152421211 is an apocalyptic number.

2152421211 is a deficient number, since it is larger than the sum of its proper divisors (736518309).

2152421211 is a wasteful number, since it uses less digits than its factorization.

2152421211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426.

The product of its digits is 320, while the sum is 21.

The square root of 2152421211 is about 46394.1937207664. The cubic root of 2152421211 is about 1291.1471899519.

Adding to 2152421211 its reverse (1121242512), we get a palindrome (3273663723).

The spelling of 2152421211 in words is "two billion, one hundred fifty-two million, four hundred twenty-one thousand, two hundred eleven".