1200200012121 has 32 divisors (see below), whose sum is σ = 1856579470848. Its totient is φ = 681590109440.

The previous prime is 1200200012119. The next prime is 1200200012149. The reversal of 1200200012121 is 1212100020021.

It is a cyclic number.

It is not a de Polignac number, because 1200200012121 - 2¹ = 1200200012119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200200012097 and 1200200012106.

It is not an unprimeable number, because it can be changed into a prime (1200200012321) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4584975 + ... + 4839668.

It is an arithmetic number, because the mean of its divisors is an integer number (58018108464).

Almost surely, 2^{1200200012121} is an apocalyptic number.

1200200012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200200012121 is a deficient number, since it is larger than the sum of its proper divisors (656379458727).

1200200012121 is a wasteful number, since it uses less digits than its factorization.

1200200012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9424901.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200200012121 its reverse (1212100020021), we get a palindrome (2412300032142).

The spelling of 1200200012121 in words is "one trillion, two hundred billion, two hundred million, twelve thousand, one hundred twenty-one".