211222111220000 has 120 divisors (see below), whose sum is σ = 520009581168000. Its totient is φ = 84428440992000.

The previous prime is 211222111219967. The next prime is 211222111220009. The reversal of 211222111220000 is 22111222112.

It is a super-2 number, since 2×211222111220000² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222111220009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24205481 + ... + 31754519.

It is an arithmetic number, because the mean of its divisors is an integer number (4333413176400).

Almost surely, 2^{211222111220000} is an apocalyptic number.

211222111220000 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 211222111220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260004790584000).

211222111220000 is an abundant number, since it is smaller than the sum of its proper divisors (308787469948000).

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

211222111220000 is an equidigital number, since it uses as much as digits as its factorization.

211222111220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550468 (or 7550445 counting only the distinct ones).

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

Adding to 211222111220000 its reverse (22111222112), we get a palindrome (211244222442112).

The spelling of 211222111220000 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty thousand".