213122133012 has 48 divisors (see below), whose sum is σ = 505779664320. Its totient is φ = 69836414208.

The previous prime is 213122132981. The next prime is 213122133109. The reversal of 213122133012 is 210331221312.

It is a self number, because there is not a number n which added to its sum of digits gives 213122133012.

It is a congruent number.

It is an unprimeable number.

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, 391978 + ... + 761505.

It is an arithmetic number, because the mean of its divisors is an integer number (10537076340).

Almost surely, 2^213122133012 is an apocalyptic number.

It is an amenable number.

213122133012 is an abundant number, since it is smaller than the sum of its proper divisors (292657531308).

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

213122133012 is a wasteful number, since it uses less digits than its factorization.

213122133012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153752 (or 1153750 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213122133012 its reverse (210331221312), we get a palindrome (423453354324).

The spelling of 213122133012 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred thirty-three thousand, twelve".