201212221221110 has 128 divisors (see below), whose sum is σ = 404703891744768. Its totient is φ = 71415426880000.

The previous prime is 201212221221103. The next prime is 201212221221127. The reversal of 201212221221110 is 11122122212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 424865267 + ... + 425338593.

It is an arithmetic number, because the mean of its divisors is an integer number (3161749154256).

Almost surely, 2^{201212221221110} is an apocalyptic number.

201212221221110 is an abundant number, since it is smaller than the sum of its proper divisors (203491670523658).

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

201212221221110 is a wasteful number, since it uses less digits than its factorization.

201212221221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473990.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212221221110 its reverse (11122122212102), we get a palindrome (212334343433212).

It can be divided in two parts, 2012122 and 21221110, that added together give a palindrome (23233232).

The spelling of 201212221221110 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".