210200121100221 has 32 divisors (see below), whose sum is σ = 321947621990400. Its totient is φ = 119498475723264.

The previous prime is 210200121100217. The next prime is 210200121100223. The reversal of 210200121100221 is 122001121002012.

It is not a de Polignac number, because 210200121100221 - 2² = 210200121100217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210200121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210200121100223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38134701 + ... + 43297293.

It is an arithmetic number, because the mean of its divisors is an integer number (10060863187200).

Almost surely, 2^{210200121100221} is an apocalyptic number.

210200121100221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210200121100221 is a deficient number, since it is larger than the sum of its proper divisors (111747500890179).

210200121100221 is a wasteful number, since it uses less digits than its factorization.

210200121100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172545.

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

Adding to 210200121100221 its reverse (122001121002012), we get a palindrome (332201242102233).

The spelling of 210200121100221 in words is "two hundred ten trillion, two hundred billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".