213121223101332 has 144 divisors (see below), whose sum is σ = 666747962375040. Its totient is φ = 55893784921344.

The previous prime is 213121223101331. The next prime is 213121223101349. The reversal of 213121223101332 is 233101322121312.

213121223101332 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 1 + 223 + 101 + 332 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 213121223101296 and 213121223101305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121223101331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181132363 + ... + 182305170.

It is an arithmetic number, because the mean of its divisors is an integer number (4630194183160).

Almost surely, 2^{213121223101332} is an apocalyptic number.

It is an amenable number.

213121223101332 is an abundant number, since it is smaller than the sum of its proper divisors (453626739273708).

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

213121223101332 is a wasteful number, since it uses less digits than its factorization.

213121223101332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363437742 (or 363437737 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 213121223101332 its reverse (233101322121312), we get a palindrome (446222545222644).

The spelling of 213121223101332 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred twenty-three million, one hundred one thousand, three hundred thirty-two".