221000212021210 has 8 divisors (see below), whose sum is σ = 397800381638196. Its totient is φ = 88400084808480.

The previous prime is 221000212021187. The next prime is 221000212021217. The reversal of 221000212021210 is 12120212000122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 220948514449569 + 51697571641 = 14864337^2 + 227371^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221000212021217) 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, 11050010601051 + ... + 11050010601070.

Almost surely, 2^{221000212021210} is an apocalyptic number.

221000212021210 is a deficient number, since it is larger than the sum of its proper divisors (176800169616986).

221000212021210 is a wasteful number, since it uses less digits than its factorization.

221000212021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100021202128.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221000212021210 its reverse (12120212000122), we get a palindrome (233120424021332).

The spelling of 221000212021210 in words is "two hundred twenty-one trillion, two hundred twelve million, twenty-one thousand, two hundred ten".