213721870016 has 28 divisors (see below), whose sum is σ = 424661731320. Its totient is φ = 106720488960.

The previous prime is 213721870007. The next prime is 213721870027. The reversal of 213721870016 is 610078127312.

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 3 ways as a sum of consecutive naturals, for example, 2145386 + ... + 2242793.

Almost surely, 2^213721870016 is an apocalyptic number.

It is an amenable number.

213721870016 is a deficient number, since it is larger than the sum of its proper divisors (210939861304).

213721870016 is an equidigital number, since it uses as much as digits as its factorization.

213721870016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4388952 (or 4388942 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

Adding to 213721870016 its reverse (610078127312), we get a palindrome (823799997328).

The spelling of 213721870016 in words is "two hundred thirteen billion, seven hundred twenty-one million, eight hundred seventy thousand, sixteen".