1231101320232 has 256 divisors, whose sum is σ = 3732168960000. Its totient is φ = 330571625472.

The previous prime is 1231101320221. The next prime is 1231101320233. The reversal of 1231101320232 is 2320231011321.

It is a super-2 number, since 2×1231101320232² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1231101320199 and 1231101320208.

It is not an unprimeable number, because it can be changed into a prime (1231101320233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 607350403 + ... + 607352429.

It is an arithmetic number, because the mean of its divisors is an integer number (14578785000).

Almost surely, 2^{1231101320232} is an apocalyptic number.

1231101320232 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 1231101320232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866084480000).

1231101320232 is an abundant number, since it is smaller than the sum of its proper divisors (2501067639768).

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

1231101320232 is a wasteful number, since it uses less digits than its factorization.

1231101320232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488 (or 3484 counting only the distinct ones).

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

Adding to 1231101320232 its reverse (2320231011321), we get a palindrome (3551332331553).

The spelling of 1231101320232 in words is "one trillion, two hundred thirty-one billion, one hundred one million, three hundred twenty thousand, two hundred thirty-two".