1200200320121 has 4 divisors (see below), whose sum is σ = 1309309440144. Its totient is φ = 1091091200100.

The previous prime is 1200200320117. The next prime is 1200200320133. The reversal of 1200200320121 is 1210230020021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1200200320121 - 2² = 1200200320117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200200320096 and 1200200320105.

It is not an unprimeable number, because it can be changed into a prime (1200200340121) 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, 54554559995 + ... + 54554560016.

It is an arithmetic number, because the mean of its divisors is an integer number (327327360036).

Almost surely, 2^{1200200320121} is an apocalyptic number.

1200200320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200200320121 is a deficient number, since it is larger than the sum of its proper divisors (109109120023).

1200200320121 is a wasteful number, since it uses less digits than its factorization.

1200200320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109109120022.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1200200320121 its reverse (1210230020021), we get a palindrome (2410430340142).

The spelling of 1200200320121 in words is "one trillion, two hundred billion, two hundred million, three hundred twenty thousand, one hundred twenty-one".