211222221220000 has 120 divisors (see below), whose sum is σ = 519688867354272. Its totient is φ = 84480674400000.

The previous prime is 211222221219983. The next prime is 211222221220013. The reversal of 211222221220000 is 22122222112.

It is a super-2 number, since 2×211222221220000² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211222221220000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 207311815 + ... + 208328185.

Almost surely, 2^{211222221220000} is an apocalyptic number.

211222221220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211222221220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259844433677136).

211222221220000 is an abundant number, since it is smaller than the sum of its proper divisors (308466646134272).

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

211222221220000 is a wasteful number, since it uses less digits than its factorization.

211222221220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026792 (or 1026769 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211222221220000 its reverse (22122222112), we get a palindrome (211244343442112).

The spelling of 211222221220000 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand".