1211120211222 has 48 divisors (see below), whose sum is σ = 2782520741520. Its totient is φ = 379402907136.

The previous prime is 1211120211199. The next prime is 1211120211233. The reversal of 1211120211222 is 2221120211121.

1211120211222 is a `hidden beast` number, since 1 + 211 + 1 + 20 + 211 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211120211195 and 1211120211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2688447 + ... + 3106442.

It is an arithmetic number, because the mean of its divisors is an integer number (57969182115).

Almost surely, 2^{1211120211222} is an apocalyptic number.

1211120211222 is an abundant number, since it is smaller than the sum of its proper divisors (1571400530298).

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

1211120211222 is a wasteful number, since it uses less digits than its factorization.

1211120211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795597 (or 5795594 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211120211222 its reverse (2221120211121), we get a palindrome (3432240422343).

The spelling of 1211120211222 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty-two".