1200111101220 has 48 divisors (see below), whose sum is σ = 3557976444288. Its totient is φ = 301204354560.

The previous prime is 1200111101177. The next prime is 1200111101243. The reversal of 1200111101220 is 221011110021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1200111101196 and 1200111101205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588288736 + ... + 588290775.

It is an arithmetic number, because the mean of its divisors is an integer number (74124509256).

Almost surely, 2^{1200111101220} is an apocalyptic number.

1200111101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200111101220 is an abundant number, since it is smaller than the sum of its proper divisors (2357865343068).

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

1200111101220 is a wasteful number, since it uses less digits than its factorization.

1200111101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176579540 (or 1176579538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200111101220 its reverse (221011110021), we get a palindrome (1421122211241).

The spelling of 1200111101220 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred one thousand, two hundred twenty".