1231231033320 has 64 divisors (see below), whose sum is σ = 3700950048000. Its totient is φ = 327683213568.

The previous prime is 1231231033303. The next prime is 1231231033321. The reversal of 1231231033320 is 233301321321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1231231033321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10017760 + ... + 10139919.

It is an arithmetic number, because the mean of its divisors is an integer number (57827344500).

Almost surely, 2^{1231231033320} is an apocalyptic number.

1231231033320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231231033320 is an abundant number, since it is smaller than the sum of its proper divisors (2469719014680).

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

1231231033320 is a wasteful number, since it uses less digits than its factorization.

1231231033320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20158202 (or 20158198 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 1231231033320 its reverse (233301321321), we get a palindrome (1464532354641).

The spelling of 1231231033320 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, thirty-three thousand, three hundred twenty".