1200110203121 has 4 divisors (see below), whose sum is σ = 1200745520100. Its totient is φ = 1199474886144.

The previous prime is 1200110203099. The next prime is 1200110203207. The reversal of 1200110203121 is 1213020110021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378348010000 + 821762193121 = 615100^2 + 906511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200110203121 - 2³⁰ = 1199036461297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200110203096 and 1200110203105.

It is not an unprimeable number, because it can be changed into a prime (1200110203321) 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 3 ways as a sum of consecutive naturals, for example, 317655656 + ... + 317659433.

It is an arithmetic number, because the mean of its divisors is an integer number (300186380025).

Almost surely, 2^{1200110203121} is an apocalyptic number.

It is an amenable number.

1200110203121 is a deficient number, since it is larger than the sum of its proper divisors (635316979).

1200110203121 is an equidigital number, since it uses as much as digits as its factorization.

1200110203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635316978.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1200110203121 its reverse (1213020110021), we get a palindrome (2413130313142).

The spelling of 1200110203121 in words is "one trillion, two hundred billion, one hundred ten million, two hundred three thousand, one hundred twenty-one".