1201321321 has 8 divisors (see below), whose sum is σ = 1226117120. Its totient is φ = 1176765408.

The previous prime is 1201321273. The next prime is 1201321327. The reversal of 1201321321 is 1231231021.

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 1201321321 - 2¹³ = 1201313129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201321295 and 1201321304.

It is not an unprimeable number, because it can be changed into a prime (1201321327) 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 7 ways as a sum of consecutive naturals, for example, 49836 + ... + 69901.

It is an arithmetic number, because the mean of its divisors is an integer number (153264640).

Almost surely, 2^1201321321 is an apocalyptic number.

It is an amenable number.

1201321321 is a deficient number, since it is larger than the sum of its proper divisors (24795799).

1201321321 is a wasteful number, since it uses less digits than its factorization.

1201321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119943.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1201321321 is about 34660.0825301960. The cubic root of 1201321321 is about 1063.0484575275.

Adding to 1201321321 its reverse (1231231021), we get a palindrome (2432552342).

The spelling of 1201321321 in words is "one billion, two hundred one million, three hundred twenty-one thousand, three hundred twenty-one".