2131211 has 8 divisors (see below), whose sum is σ = 2257920. Its totient is φ = 2005992.

The previous prime is 2131193. The next prime is 2131223. The reversal of 2131211 is 1121312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131192 and 2131201.

It is not an unprimeable number, because it can be changed into a prime (2131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3986 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (282240).

2^2131211 is an apocalyptic number.

2131211 is a deficient number, since it is larger than the sum of its proper divisors (126709).

2131211 is a wasteful number, since it uses less digits than its factorization.

2131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

The product of its digits is 12, while the sum is 11.

The square root of 2131211 is about 1459.8667747435. The cubic root of 2131211 is about 128.6892144018.

Adding to 2131211 its reverse (1121312), we get a palindrome (3252523).

It can be divided in two parts, 21312 and 11, that multiplied together give a palindrome (234432).

The spelling of 2131211 in words is "two million, one hundred thirty-one thousand, two hundred eleven".