211031203842 has 48 divisors (see below), whose sum is σ = 485805804120. Its totient is φ = 66205840128.

The previous prime is 211031203841. The next prime is 211031203843. The reversal of 211031203842 is 248302130112.

It is an interprime number because it is at equal distance from previous prime (211031203841) and next prime (211031203843).

It can be written as a sum of positive squares in 4 ways, for example, as 209051042841 + 1980161001 = 457221^2 + 44499^2 .

It is not an unprimeable number, because it can be changed into a prime (211031203841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104723 + ... + 1281590.

Almost surely, 2^211031203842 is an apocalyptic number.

211031203842 is an abundant number, since it is smaller than the sum of its proper divisors (274774600278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211031203842 is a wasteful number, since it uses less digits than its factorization.

211031203842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386372 (or 2386335 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 211031203842 its reverse (248302130112), we get a palindrome (459333333954).

The spelling of 211031203842 in words is "two hundred eleven billion, thirty-one million, two hundred three thousand, eight hundred forty-two".