1211120222220 has 36 divisors (see below), whose sum is σ = 3673731341280. Its totient is φ = 322965392544.

The previous prime is 1211120222201. The next prime is 1211120222243. The reversal of 1211120222220 is 222220211121.

It is a happy number.

1211120222220 is a `hidden beast` number, since 1 + 211 + 12 + 0 + 222 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1211120222193 and 1211120222202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3364222660 + ... + 3364223019.

Almost surely, 2^{1211120222220} is an apocalyptic number.

1211120222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211120222220 is an abundant number, since it is smaller than the sum of its proper divisors (2462611119060).

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

1211120222220 is a wasteful number, since it uses less digits than its factorization.

1211120222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728445694 (or 6728445689 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1211120222220 its reverse (222220211121), we get a palindrome (1433340433341).

The spelling of 1211120222220 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty".