221210121200210 has 32 divisors (see below), whose sum is σ = 408979018071360. Its totient is φ = 86084329511232.

The previous prime is 221210121200209. The next prime is 221210121200219. The reversal of 221210121200210 is 12002121012122.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221210121200219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24811100 + ... + 32527079.

It is an arithmetic number, because the mean of its divisors is an integer number (12780594314730).

Almost surely, 2^{221210121200210} is an apocalyptic number.

221210121200210 is a deficient number, since it is larger than the sum of its proper divisors (187768896871150).

221210121200210 is a wasteful number, since it uses less digits than its factorization.

221210121200210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57348650.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221210121200210 its reverse (12002121012122), we get a palindrome (233212242212332).

The spelling of 221210121200210 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two hundred thousand, two hundred ten".