1200230121 has 4 divisors (see below), whose sum is σ = 1600306832. Its totient is φ = 800153412.

The previous prime is 1200230099. The next prime is 1200230123. The reversal of 1200230121 is 1210320021.

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 1200230121 - 2⁹ = 1200229609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200230097 and 1200230106.

It is not an unprimeable number, because it can be changed into a prime (1200230123) 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, 200038351 + ... + 200038356.

It is an arithmetic number, because the mean of its divisors is an integer number (400076708).

Almost surely, 2^1200230121 is an apocalyptic number.

It is an amenable number.

1200230121 is a deficient number, since it is larger than the sum of its proper divisors (400076711).

1200230121 is an equidigital number, since it uses as much as digits as its factorization.

1200230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400076710.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1200230121 is about 34644.3375026858. The cubic root of 1200230121 is about 1062.7264926333.

Adding to 1200230121 its reverse (1210320021), we get a palindrome (2410550142).

The spelling of 1200230121 in words is "one billion, two hundred million, two hundred thirty thousand, one hundred twenty-one".