1111111100120 has 64 divisors (see below), whose sum is σ = 2858236476480. Its totient is φ = 380806557696.

The previous prime is 1111111100111. The next prime is 1111111100129. The reversal of 1111111100120 is 210011111111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1111111100111) and next prime (1111111100129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111111100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25409 + ... + 1490928.

It is an arithmetic number, because the mean of its divisors is an integer number (44659944945).

Almost surely, 2^{1111111100120} is an apocalyptic number.

1111111100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111111100120 is an abundant number, since it is smaller than the sum of its proper divisors (1747125376360).

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

1111111100120 is a wasteful number, since it uses less digits than its factorization.

1111111100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518972 (or 1518968 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1111111100120 its reverse (210011111111), we get a palindrome (1321122211231).

The spelling of 1111111100120 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred thousand, one hundred twenty".