1200010200121 has 4 divisors (see below), whose sum is σ = 1252184556672. Its totient is φ = 1147835843572.

The previous prime is 1200010200113. The next prime is 1200010200131. The reversal of 1200010200121 is 1210020100021.

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 a cyclic number.

It is not a de Polignac number, because 1200010200121 - 2³ = 1200010200113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200010200098 and 1200010200107.

It is not an unprimeable number, because it can be changed into a prime (1200010200131) 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, 26087178241 + ... + 26087178286.

It is an arithmetic number, because the mean of its divisors is an integer number (313046139168).

Almost surely, 2^{1200010200121} is an apocalyptic number.

It is an amenable number.

1200010200121 is a deficient number, since it is larger than the sum of its proper divisors (52174356551).

1200010200121 is an equidigital number, since it uses as much as digits as its factorization.

1200010200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52174356550.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200010200121 its reverse (1210020100021), we get a palindrome (2410030300142).

The spelling of 1200010200121 in words is "one trillion, two hundred billion, ten million, two hundred thousand, one hundred twenty-one".