1231032021208 has 128 divisors (see below), whose sum is σ = 2676022272000. Its totient is φ = 525847432320.

The previous prime is 1231032021157. The next prime is 1231032021229. The reversal of 1231032021208 is 8021202301321.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10434373 + ... + 10551691.

It is an arithmetic number, because the mean of its divisors is an integer number (20906424000).

Almost surely, 2^{1231032021208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231032021208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338011136000).

1231032021208 is an abundant number, since it is smaller than the sum of its proper divisors (1444990250792).

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

1231032021208 is a wasteful number, since it uses less digits than its factorization.

1231032021208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117485 (or 117481 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1231032021208 its reverse (8021202301321), we get a palindrome (9252234322529).

The spelling of 1231032021208 in words is "one trillion, two hundred thirty-one billion, thirty-two million, twenty-one thousand, two hundred eight".