1200130120121 has 4 divisors (see below), whose sum is σ = 1200132553332. Its totient is φ = 1200127686912.

The previous prime is 1200130120109. The next prime is 1200130120139. The reversal of 1200130120121 is 1210210310021.

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 331245140521 + 868884979600 = 575539^2 + 932140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200130120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200130120096 and 1200130120105.

It is not an unprimeable number, because it can be changed into a prime (1200130110121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185420 + ... + 1560333.

It is an arithmetic number, because the mean of its divisors is an integer number (300033138333).

Almost surely, 2^{1200130120121} is an apocalyptic number.

It is an amenable number.

1200130120121 is a deficient number, since it is larger than the sum of its proper divisors (2433211).

1200130120121 is an equidigital number, since it uses as much as digits as its factorization.

1200130120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433210.

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

Adding to 1200130120121 its reverse (1210210310021), we get a palindrome (2410340430142).

The spelling of 1200130120121 in words is "one trillion, two hundred billion, one hundred thirty million, one hundred twenty thousand, one hundred twenty-one".