1200231031321 has 16 divisors (see below), whose sum is σ = 1391456809600. Its totient is φ = 1013966045568.

The previous prime is 1200231031303. The next prime is 1200231031343. The reversal of 1200231031321 is 1231301320021.

It is not a de Polignac number, because 1200231031321 - 2⁹ = 1200231030809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200231031361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91611 + ... + 1552048.

It is an arithmetic number, because the mean of its divisors is an integer number (86966050600).

Almost surely, 2^{1200231031321} is an apocalyptic number.

It is an amenable number.

1200231031321 is a deficient number, since it is larger than the sum of its proper divisors (191225778279).

1200231031321 is a wasteful number, since it uses less digits than its factorization.

1200231031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645168.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1200231031321 its reverse (1231301320021), we get a palindrome (2431532351342).

The spelling of 1200231031321 in words is "one trillion, two hundred billion, two hundred thirty-one million, thirty-one thousand, three hundred twenty-one".