1231011302232 has 128 divisors (see below), whose sum is σ = 3237224693760. Its totient is φ = 389660244480.

The previous prime is 1231011302161. The next prime is 1231011302233. The reversal of 1231011302232 is 2322031101321.

It is a junction number, because it is equal to n+sod(n) for n = 1231011302199 and 1231011302208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231011302233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8920753 + ... + 9057695.

It is an arithmetic number, because the mean of its divisors is an integer number (25290817920).

Almost surely, 2^{1231011302232} is an apocalyptic number.

1231011302232 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 1231011302232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1618612346880).

1231011302232 is an abundant number, since it is smaller than the sum of its proper divisors (2006213391528).

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

1231011302232 is a wasteful number, since it uses less digits than its factorization.

1231011302232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137233 (or 137229 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1231011302232 its reverse (2322031101321), we get a palindrome (3553042403553).

The spelling of 1231011302232 in words is "one trillion, two hundred thirty-one billion, eleven million, three hundred two thousand, two hundred thirty-two".