1231203003312 has 160 divisors (see below), whose sum is σ = 3314727328000. Its totient is φ = 393475138560.

The previous prime is 1231203003271. The next prime is 1231203003337. The reversal of 1231203003312 is 2133003021321.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62816298 + ... + 62835894.

It is an arithmetic number, because the mean of its divisors is an integer number (20717045800).

Almost surely, 2^{1231203003312} is an apocalyptic number.

1231203003312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231203003312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1657363664000).

1231203003312 is an abundant number, since it is smaller than the sum of its proper divisors (2083524324688).

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

1231203003312 is a wasteful number, since it uses less digits than its factorization.

1231203003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20211 (or 20205 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1231203003312 its reverse (2133003021321), we get a palindrome (3364206024633).

The spelling of 1231203003312 in words is "one trillion, two hundred thirty-one billion, two hundred three million, three thousand, three hundred twelve".