1203201121 has 2 divisors, whose sum is σ = 1203201122. Its totient is φ = 1203201120.

The previous prime is 1203201107. The next prime is 1203201127. The reversal of 1203201121 is 1211023021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 820020496 + 383180625 = 28636^2 + 19575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203201121 - 2⁵ = 1203201089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203201127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601600560 + 601600561.

It is an arithmetic number, because the mean of its divisors is an integer number (601600561).

Almost surely, 2^1203201121 is an apocalyptic number.

It is an amenable number.

1203201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203201121 is an equidigital number, since it uses as much as digits as its factorization.

1203201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1203201121 is about 34687.1895805930. The cubic root of 1203201121 is about 1063.6026465007.

Adding to 1203201121 its reverse (1211023021), we get a palindrome (2414224142).

The spelling of 1203201121 in words is "one billion, two hundred three million, two hundred one thousand, one hundred twenty-one".