1203220121 has 8 divisors (see below), whose sum is σ = 1245097920. Its totient is φ = 1161368208.

The previous prime is 1203220097. The next prime is 1203220129. The reversal of 1203220121 is 1210223021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203220121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1203220096 and 1203220105.

It is not an unprimeable number, because it can be changed into a prime (1203220129) 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 7 ways as a sum of consecutive naturals, for example, 170750 + ... + 177656.

It is an arithmetic number, because the mean of its divisors is an integer number (155637240).

Almost surely, 2^1203220121 is an apocalyptic number.

It is an amenable number.

1203220121 is a deficient number, since it is larger than the sum of its proper divisors (41877799).

1203220121 is an equidigital number, since it uses as much as digits as its factorization.

1203220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12943.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1203220121 is about 34687.4634558366. The cubic root of 1203220121 is about 1063.6082449950.

Adding to 1203220121 its reverse (1210223021), we get a palindrome (2413443142).

The spelling of 1203220121 in words is "one billion, two hundred three million, two hundred twenty thousand, one hundred twenty-one".