212221100101220 has 24 divisors (see below), whose sum is σ = 509330640243264. Its totient is φ = 72761520034656.

The previous prime is 212221100101211. The next prime is 212221100101289. The reversal of 212221100101220 is 22101001122212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757932500222 + ... + 757932500501.

It is an arithmetic number, because the mean of its divisors is an integer number (21222110010136).

Almost surely, 2^{212221100101220} is an apocalyptic number.

212221100101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221100101220 is an abundant number, since it is smaller than the sum of its proper divisors (297109540142044).

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

212221100101220 is a wasteful number, since it uses less digits than its factorization.

212221100101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515865000739 (or 1515865000737 counting only the distinct ones).

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

Adding to 212221100101220 its reverse (22101001122212), we get a palindrome (234322101223432).

The spelling of 212221100101220 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred million, one hundred one thousand, two hundred twenty".