210561721214 has 8 divisors (see below), whose sum is σ = 340138165080. Its totient is φ = 97182332856.

The previous prime is 210561721213. The next prime is 210561721229. The reversal of 210561721214 is 412127165012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210561721213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4049263844 + ... + 4049263895.

It is an arithmetic number, because the mean of its divisors is an integer number (42517270635).

Almost surely, 2^210561721214 is an apocalyptic number.

210561721214 is a deficient number, since it is larger than the sum of its proper divisors (129576443866).

210561721214 is a wasteful number, since it uses less digits than its factorization.

210561721214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8098527754.

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 210561721214 its reverse (412127165012), we get a palindrome (622688886226).

The spelling of 210561721214 in words is "two hundred ten billion, five hundred sixty-one million, seven hundred twenty-one thousand, two hundred fourteen".