210001210221 has 8 divisors (see below), whose sum is σ = 305456305824. Its totient is φ = 127273460720.

The previous prime is 210001210219. The next prime is 210001210241. The reversal of 210001210221 is 122012100012.

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

It is a cyclic number.

It is not a de Polignac number, because 210001210221 - 2¹ = 210001210219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210001210197 and 210001210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001210241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3181836486 + ... + 3181836551.

It is an arithmetic number, because the mean of its divisors is an integer number (38182038228).

Almost surely, 2^210001210221 is an apocalyptic number.

It is an amenable number.

210001210221 is a deficient number, since it is larger than the sum of its proper divisors (95455095603).

210001210221 is a wasteful number, since it uses less digits than its factorization.

210001210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363673051.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210001210221 its reverse (122012100012), we get a palindrome (332013310233).

The spelling of 210001210221 in words is "two hundred ten billion, one million, two hundred ten thousand, two hundred twenty-one".