1201302312321 has 4 divisors (see below), whose sum is σ = 1601736416432. Its totient is φ = 800868208212.

The previous prime is 1201302312313. The next prime is 1201302312421. The reversal of 1201302312321 is 1232132031021.

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 1201302312321 - 2³ = 1201302312313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201302312121) 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 3 ways as a sum of consecutive naturals, for example, 200217052051 + ... + 200217052056.

It is an arithmetic number, because the mean of its divisors is an integer number (400434104108).

Almost surely, 2^{1201302312321} is an apocalyptic number.

It is an amenable number.

1201302312321 is a deficient number, since it is larger than the sum of its proper divisors (400434104111).

1201302312321 is an equidigital number, since it uses as much as digits as its factorization.

1201302312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400434104110.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1201302312321 its reverse (1232132031021), we get a palindrome (2433434343342).

The spelling of 1201302312321 in words is "one trillion, two hundred one billion, three hundred two million, three hundred twelve thousand, three hundred twenty-one".