211331012 has 12 divisors (see below), whose sum is σ = 391584060. Its totient is φ = 99449856.

The previous prime is 211331011. The next prime is 211331051. The reversal of 211331012 is 210133112.

It can be written as a sum of positive squares in 2 ways, for example, as 78251716 + 133079296 = 8846^2 + 11536^2 .

It is not an unprimeable number, because it can be changed into a prime (211331011) 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 3 ways as a sum of consecutive naturals, for example, 1553837 + ... + 1553972.

It is an arithmetic number, because the mean of its divisors is an integer number (32632005).

Almost surely, 2^211331012 is an apocalyptic number.

It is an amenable number.

211331012 is a deficient number, since it is larger than the sum of its proper divisors (180253048).

211331012 is a wasteful number, since it uses less digits than its factorization.

211331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107830 (or 3107828 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211331012 is about 14537.2284841369. The cubic root of 211331012 is about 595.6453342342.

Adding to 211331012 its reverse (210133112), we get a palindrome (421464124).

The spelling of 211331012 in words is "two hundred eleven million, three hundred thirty-one thousand, twelve".