1303213121 has 8 divisors (see below), whose sum is σ = 1490100480. Its totient is φ = 1116504288.

The previous prime is 1303213117. The next prime is 1303213127. The reversal of 1303213121 is 1213123031.

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

It is a cyclic number.

It is not a de Polignac number, because 1303213121 - 2² = 1303213117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1303213121.

It is not an unprimeable number, because it can be changed into a prime (1303213127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28601 + ... + 58518.

It is an arithmetic number, because the mean of its divisors is an integer number (186262560).

Almost surely, 2^1303213121 is an apocalyptic number.

It is an amenable number.

1303213121 is a deficient number, since it is larger than the sum of its proper divisors (186887359).

1303213121 is an equidigital number, since it uses as much as digits as its factorization.

1303213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89263.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1303213121 is about 36100.0432271209. The cubic root of 1303213121 is about 1092.2913169582.

Adding to 1303213121 its reverse (1213123031), we get a palindrome (2516336152).

The spelling of 1303213121 in words is "one billion, three hundred three million, two hundred thirteen thousand, one hundred twenty-one".