211202221222120 has 16 divisors (see below), whose sum is σ = 475204997749860. Its totient is φ = 84480888488832.

The previous prime is 211202221222103. The next prime is 211202221222129. The reversal of 211202221222120 is 21222122202112.

It can be written as a sum of positive squares in 2 ways, for example, as 209644163060836 + 1558058161284 = 14479094^2 + 1248222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211202221222091 and 211202221222100.

It is not an unprimeable number, because it can be changed into a prime (211202221222129) 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, 2640027765237 + ... + 2640027765316.

Almost surely, 2^{211202221222120} is an apocalyptic number.

211202221222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202221222120 is an abundant number, since it is smaller than the sum of its proper divisors (264002776527740).

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

211202221222120 is a wasteful number, since it uses less digits than its factorization.

211202221222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280055530564 (or 5280055530560 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211202221222120 its reverse (21222122202112), we get a palindrome (232424343424232).

The spelling of 211202221222120 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".