1231201112320 has 36 divisors (see below), whose sum is σ = 2949111417420. Its totient is φ = 492480444416.

The previous prime is 1231201112293. The next prime is 1231201112333. The reversal of 1231201112320 is 232111021321.

It can be written as a sum of positive squares in 2 ways, for example, as 197221257216 + 1033979855104 = 444096^2 + 1016848^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480936655 + ... + 480939214.

It is an arithmetic number, because the mean of its divisors is an integer number (81919761595).

Almost surely, 2^{1231201112320} is an apocalyptic number.

1231201112320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231201112320 is an abundant number, since it is smaller than the sum of its proper divisors (1717910305100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231201112320 is an frugal number, since it uses more digits than its factorization.

1231201112320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961875890 (or 961875876 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1231201112320 its reverse (232111021321), we get a palindrome (1463312133641).

Subtracting from 1231201112320 its reverse (232111021321), we obtain a palindrome (999090090999).

The spelling of 1231201112320 in words is "one trillion, two hundred thirty-one billion, two hundred one million, one hundred twelve thousand, three hundred twenty".