1211120112120 has 32 divisors (see below), whose sum is σ = 3633360336720. Its totient is φ = 322965363200.

The previous prime is 1211120112073. The next prime is 1211120112199. The reversal of 1211120112120 is 212110211121.

It is a happy number.

It is a super-2 number, since 2×1211120112120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1211120112120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5046333681 + ... + 5046333920.

Almost surely, 2^{1211120112120} is an apocalyptic number.

1211120112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211120112120 is an abundant number, since it is smaller than the sum of its proper divisors (2422240224600).

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

1211120112120 is a wasteful number, since it uses less digits than its factorization.

1211120112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092667615 (or 10092667611 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211120112120 its reverse (212110211121), we get a palindrome (1423230323241).

Subtracting from 1211120112120 its reverse (212110211121), we obtain a palindrome (999009900999).

The spelling of 1211120112120 in words is "one trillion, two hundred eleven billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty".