1031131221232 has 120 divisors (see below), whose sum is σ = 2403444117152. Its totient is φ = 419677977600.

The previous prime is 1031131221161. The next prime is 1031131221269. The reversal of 1031131221232 is 2321221311301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5655982 + ... + 5835442.

Almost surely, 2^{1031131221232} 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 1031131221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1201722058576).

1031131221232 is an abundant number, since it is smaller than the sum of its proper divisors (1372312895920).

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

1031131221232 is a wasteful number, since it uses less digits than its factorization.

1031131221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179595 (or 179560 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1031131221232 its reverse (2321221311301), we get a palindrome (3352352532533).

The spelling of 1031131221232 in words is "one trillion, thirty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty-two".