210200001221 has 8 divisors (see below), whose sum is σ = 252872182080. Its totient is φ = 170688722688.

The previous prime is 210200001163. The next prime is 210200001241. The reversal of 210200001221 is 122100002012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210200001221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210200001241) 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, 790225436 + ... + 790225701.

It is an arithmetic number, because the mean of its divisors is an integer number (31609022760).

Almost surely, 2^210200001221 is an apocalyptic number.

It is an amenable number.

210200001221 is a deficient number, since it is larger than the sum of its proper divisors (42672180859).

210200001221 is a wasteful number, since it uses less digits than its factorization.

210200001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580451163.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210200001221 its reverse (122100002012), we get a palindrome (332300003233).

The spelling of 210200001221 in words is "two hundred ten billion, two hundred million, one thousand, two hundred twenty-one".