213321120166 has 16 divisors (see below), whose sum is σ = 398938199040. Its totient is φ = 83112124680.

The previous prime is 213321120151. The next prime is 213321120193. The reversal of 213321120166 is 661021123312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692600886 + ... + 692601193.

It is an arithmetic number, because the mean of its divisors is an integer number (24933637440).

Almost surely, 2^213321120166 is an apocalyptic number.

213321120166 is a deficient number, since it is larger than the sum of its proper divisors (185617078874).

213321120166 is a wasteful number, since it uses less digits than its factorization.

213321120166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385202099.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 213321120166 its reverse (661021123312), we get a palindrome (874342243478).

The spelling of 213321120166 in words is "two hundred thirteen billion, three hundred twenty-one million, one hundred twenty thousand, one hundred sixty-six".