221210121212202 has 16 divisors (see below), whose sum is σ = 468444962567232. Its totient is φ = 69399253713600.

The previous prime is 221210121212147. The next prime is 221210121212209. The reversal of 221210121212202 is 202212121012122.

It is not an unprimeable number, because it can be changed into a prime (221210121212209) 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, 1084363339174 + ... + 1084363339377.

It is an arithmetic number, because the mean of its divisors is an integer number (29277810160452).

Almost surely, 2^{221210121212202} is an apocalyptic number.

221210121212202 is an abundant number, since it is smaller than the sum of its proper divisors (247234841355030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221210121212202 is a wasteful number, since it uses less digits than its factorization.

221210121212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168726678573.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221210121212202 its reverse (202212121012122), we get a palindrome (423422242224324).

The spelling of 221210121212202 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred two".