2131212011 has 4 divisors (see below), whose sum is σ = 2131311000. Its totient is φ = 2131113024.

The previous prime is 2131211989. The next prime is 2131212023. The reversal of 2131212011 is 1102121312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2131212011 - 2²² = 2127017707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131214011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021 + ... + 65318.

It is an arithmetic number, because the mean of its divisors is an integer number (532827750).

Almost surely, 2^2131212011 is an apocalyptic number.

2131212011 is a deficient number, since it is larger than the sum of its proper divisors (98989).

2131212011 is an equidigital number, since it uses as much as digits as its factorization.

2131212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98988.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2131212011 is about 46165.0518357772. The cubic root of 2131212011 is about 1286.8923475095.

Adding to 2131212011 its reverse (1102121312), we get a palindrome (3233333323).

The spelling of 2131212011 in words is "two billion, one hundred thirty-one million, two hundred twelve thousand, eleven".