2131251211 has 8 divisors (see below), whose sum is σ = 2172153024. Its totient is φ = 2090375040.

The previous prime is 2131251203. The next prime is 2131251251. The reversal of 2131251211 is 1121521312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131251211 - 2³ = 2131251203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131251251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295731 + ... + 302851.

It is an arithmetic number, because the mean of its divisors is an integer number (271519128).

Almost surely, 2^2131251211 is an apocalyptic number.

2131251211 is a deficient number, since it is larger than the sum of its proper divisors (40901813).

2131251211 is an equidigital number, since it uses as much as digits as its factorization.

2131251211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12821.

The product of its digits is 120, while the sum is 19.

The square root of 2131251211 is about 46165.4763974120. The cubic root of 2131251211 is about 1286.9002375224.

Adding to 2131251211 its reverse (1121521312), we get a palindrome (3252772523).

The spelling of 2131251211 in words is "two billion, one hundred thirty-one million, two hundred fifty-one thousand, two hundred eleven".