1201002321 has 4 divisors (see below), whose sum is σ = 1601336432. Its totient is φ = 800668212.

The previous prime is 1201002311. The next prime is 1201002323. The reversal of 1201002321 is 1232001021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1201002321 - 2⁷ = 1201002193 is a prime.

It is a super-3 number, since 3×1201002321³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201002297 and 1201002306.

It is not an unprimeable number, because it can be changed into a prime (1201002323) 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 3 ways as a sum of consecutive naturals, for example, 200167051 + ... + 200167056.

It is an arithmetic number, because the mean of its divisors is an integer number (400334108).

Almost surely, 2^1201002321 is an apocalyptic number.

It is an amenable number.

1201002321 is a deficient number, since it is larger than the sum of its proper divisors (400334111).

1201002321 is an equidigital number, since it uses as much as digits as its factorization.

1201002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400334110.

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

The square root of 1201002321 is about 34655.4803891102. The cubic root of 1201002321 is about 1062.9543549000.

Adding to 1201002321 its reverse (1232001021), we get a palindrome (2433003342).

The spelling of 1201002321 in words is "one billion, two hundred one million, two thousand, three hundred twenty-one".