212105115355 has 64 divisors (see below), whose sum is σ = 303066489600. Its totient is φ = 139428495360.

The previous prime is 212105115353. The next prime is 212105115421. The reversal of 212105115355 is 553511501212.

It is not a de Polignac number, because 212105115355 - 2¹ = 212105115353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212105115353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 172582881 + ... + 172584109.

It is an arithmetic number, because the mean of its divisors is an integer number (4735413900).

Almost surely, 2^212105115355 is an apocalyptic number.

212105115355 is a deficient number, since it is larger than the sum of its proper divisors (90961374245).

212105115355 is a wasteful number, since it uses less digits than its factorization.

212105115355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 7500, while the sum is 31.

Adding to 212105115355 its reverse (553511501212), we get a palindrome (765616616567).

The spelling of 212105115355 in words is "two hundred twelve billion, one hundred five million, one hundred fifteen thousand, three hundred fifty-five".