1203200121 has 16 divisors (see below), whose sum is σ = 1630762560. Its totient is φ = 788971200.

The previous prime is 1203200113. The next prime is 1203200123. The reversal of 1203200121 is 1210023021.

It is not a de Polignac number, because 1203200121 - 2³ = 1203200113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203200097 and 1203200106.

It is not an unprimeable number, because it can be changed into a prime (1203200123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46471 + ... + 67571.

It is an arithmetic number, because the mean of its divisors is an integer number (101922660).

Almost surely, 2^1203200121 is an apocalyptic number.

It is an amenable number.

1203200121 is a deficient number, since it is larger than the sum of its proper divisors (427562439).

1203200121 is a wasteful number, since it uses less digits than its factorization.

1203200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416.

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

The square root of 1203200121 is about 34687.1751660466. The cubic root of 1203200121 is about 1063.6023518414.

Adding to 1203200121 its reverse (1210023021), we get a palindrome (2413223142).

The spelling of 1203200121 in words is "one billion, two hundred three million, two hundred thousand, one hundred twenty-one".