2131220211 has 16 divisors (see below), whose sum is σ = 2882795520. Its totient is φ = 1400366880.

The previous prime is 2131220131. The next prime is 2131220213. The reversal of 2131220211 is 1120221312.

It is not a de Polignac number, because 2131220211 - 2⁷ = 2131220083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131220213) 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, 45396 + ... + 79518.

It is an arithmetic number, because the mean of its divisors is an integer number (180174720).

Almost surely, 2^2131220211 is an apocalyptic number.

2131220211 is a deficient number, since it is larger than the sum of its proper divisors (751575309).

2131220211 is a wasteful number, since it uses less digits than its factorization.

2131220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34426.

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

The square root of 2131220211 is about 46165.1406474626. The cubic root of 2131220211 is about 1286.8939979794.

Adding to 2131220211 its reverse (1120221312), we get a palindrome (3251441523).

The spelling of 2131220211 in words is "two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred eleven".