210200120011221 has 4 divisors (see below), whose sum is σ = 280266826681632. Its totient is φ = 140133413340812.

The previous prime is 210200120011153. The next prime is 210200120011247. The reversal of 210200120011221 is 122110021002012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210200120011221 - 2⁴² = 205802073500117 is a prime.

It is a super-2 number, since 2×210200120011221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210200120011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210200120018221) 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, 35033353335201 + ... + 35033353335206.

It is an arithmetic number, because the mean of its divisors is an integer number (70066706670408).

Almost surely, 2^{210200120011221} is an apocalyptic number.

It is an amenable number.

210200120011221 is a deficient number, since it is larger than the sum of its proper divisors (70066706670411).

210200120011221 is an equidigital number, since it uses as much as digits as its factorization.

210200120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70066706670410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210200120011221 its reverse (122110021002012), we get a palindrome (332310141013233).

The spelling of 210200120011221 in words is "two hundred ten trillion, two hundred billion, one hundred twenty million, eleven thousand, two hundred twenty-one".