1200442312100 has 18 divisors (see below), whose sum is σ = 2604959817474. Its totient is φ = 480176924800.

The previous prime is 1200442312093. The next prime is 1200442312117. The reversal of 1200442312100 is 12132440021.

It can be written as a sum of positive squares in 3 ways, for example, as 261415418944 + 939026893156 = 511288^2 + 969034^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6002211461 + ... + 6002211660.

Almost surely, 2^{1200442312100} is an apocalyptic number.

1200442312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200442312100 is an abundant number, since it is smaller than the sum of its proper divisors (1404517505374).

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

1200442312100 is a wasteful number, since it uses less digits than its factorization.

1200442312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004423135 (or 12004423128 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1200442312100 its reverse (12132440021), we get a palindrome (1212574752121).

The spelling of 1200442312100 in words is "one trillion, two hundred billion, four hundred forty-two million, three hundred twelve thousand, one hundred".