213105235143321 has 6 divisors (see below), whose sum is σ = 307818672984810. Its totient is φ = 142070156762208.

The previous prime is 213105235143277. The next prime is 213105235143347. The reversal of 213105235143321 is 123341532501312.

213105235143321 is a `hidden beast` number, since 2 + 1 + 3 + 10 + 523 + 51 + 43 + 32 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 154384601025600 + 58720634117721 = 12425160^2 + 7662939^2 .

It is not a de Polignac number, because 213105235143321 - 2¹¹ = 213105235141273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213105235142321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11839179730176 + ... + 11839179730193.

It is an arithmetic number, because the mean of its divisors is an integer number (51303112164135).

Almost surely, 2^{213105235143321} is an apocalyptic number.

It is an amenable number.

213105235143321 is a deficient number, since it is larger than the sum of its proper divisors (94713437841489).

213105235143321 is a wasteful number, since it uses less digits than its factorization.

213105235143321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23678359460375 (or 23678359460372 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 213105235143321 its reverse (123341532501312), we get a palindrome (336446767644633).

The spelling of 213105235143321 in words is "two hundred thirteen trillion, one hundred five billion, two hundred thirty-five million, one hundred forty-three thousand, three hundred twenty-one".