212131853733 has 16 divisors (see below), whose sum is σ = 297774307520. Its totient is φ = 133957587456.

The previous prime is 212131853669. The next prime is 212131853741. The reversal of 212131853733 is 337358131212.

It is not a de Polignac number, because 212131853733 - 2⁶ = 212131853669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212131853691 and 212131853700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131853233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97941 + ... + 658677.

It is an arithmetic number, because the mean of its divisors is an integer number (18610894220).

Almost surely, 2^212131853733 is an apocalyptic number.

It is an amenable number.

212131853733 is a deficient number, since it is larger than the sum of its proper divisors (85642453787).

212131853733 is a wasteful number, since it uses less digits than its factorization.

212131853733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567396.

The product of its digits is 90720, while the sum is 39.

Adding to 212131853733 its reverse (337358131212), we get a palindrome (549489984945).

The spelling of 212131853733 in words is "two hundred twelve billion, one hundred thirty-one million, eight hundred fifty-three thousand, seven hundred thirty-three".