1200111222100 has 72 divisors (see below), whose sum is σ = 2979876150720. Its totient is φ = 410968965120.

The previous prime is 1200111222083. The next prime is 1200111222119. The reversal of 1200111222100 is 12221110021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 457645 + ... + 1615444.

It is an arithmetic number, because the mean of its divisors is an integer number (41387168760).

Almost surely, 2^{1200111222100} is an apocalyptic number.

1200111222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200111222100 is an abundant number, since it is smaller than the sum of its proper divisors (1779764928620).

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

1200111222100 is a wasteful number, since it uses less digits than its factorization.

1200111222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073937 (or 2073930 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200111222100 its reverse (12221110021), we get a palindrome (1212332332121).

The spelling of 1200111222100 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred twenty-two thousand, one hundred".