1231324422440 has 64 divisors (see below), whose sum is σ = 3174004569600. Its totient is φ = 421136137728.

The previous prime is 1231324422421. The next prime is 1231324422521. The reversal of 1231324422440 is 442244231321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1231324422397 and 1231324422406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5261504 + ... + 5490543.

It is an arithmetic number, because the mean of its divisors is an integer number (49593821400).

Almost surely, 2^{1231324422440} is an apocalyptic number.

1231324422440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231324422440 is an abundant number, since it is smaller than the sum of its proper divisors (1942680147160).

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

1231324422440 is a wasteful number, since it uses less digits than its factorization.

1231324422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752474 (or 10752470 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 1231324422440 its reverse (442244231321), we get a palindrome (1673568653761).

The spelling of 1231324422440 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-four million, four hundred twenty-two thousand, four hundred forty".