1321123140432 has 60 divisors (see below), whose sum is σ = 3697559005140. Its totient is φ = 440344710144.

The previous prime is 1321123140413. The next prime is 1321123140457. The reversal of 1321123140432 is 2340413211231.

1321123140432 is a `hidden beast` number, since 1 + 3 + 21 + 1 + 231 + 404 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 946020788496 + 375102351936 = 972636^2 + 612456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321123140396 and 1321123140405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1889794 + ... + 2492702.

It is an arithmetic number, because the mean of its divisors is an integer number (61625983419).

Almost surely, 2^{1321123140432} is an apocalyptic number.

1321123140432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321123140432 is an abundant number, since it is smaller than the sum of its proper divisors (2376435864708).

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

1321123140432 is a wasteful number, since it uses less digits than its factorization.

1321123140432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618140 (or 618131 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1321123140432 its reverse (2340413211231), we get a palindrome (3661536351663).

The spelling of 1321123140432 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred forty thousand, four hundred thirty-two".