1201030321 has 4 divisors (see below), whose sum is σ = 1201648500. Its totient is φ = 1200412144.

The previous prime is 1201030319. The next prime is 1201030333. The reversal of 1201030321 is 1230301021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1138050225 + 62980096 = 33735^2 + 7936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201030321 - 2¹ = 1201030319 is a prime.

It is a super-2 number, since 2×1201030321² = 2884947663922726082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201030301) 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, 306166 + ... + 310063.

It is an arithmetic number, because the mean of its divisors is an integer number (300412125).

Almost surely, 2^1201030321 is an apocalyptic number.

It is an amenable number.

1201030321 is a deficient number, since it is larger than the sum of its proper divisors (618179).

1201030321 is an equidigital number, since it uses as much as digits as its factorization.

1201030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618178.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1201030321 is about 34655.8843632651. The cubic root of 1201030321 is about 1062.9626153588.

Adding to 1201030321 its reverse (1230301021), we get a palindrome (2431331342).

The spelling of 1201030321 in words is "one billion, two hundred one million, thirty thousand, three hundred twenty-one".