12401323242440 has 128 divisors (see below), whose sum is σ = 31445805726720. Its totient is φ = 4360731033600.

The previous prime is 12401323242439. The next prime is 12401323242467. The reversal of 12401323242440 is 4424232310421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12401323242397 and 12401323242406.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17340584 + ... + 18041576.

It is an arithmetic number, because the mean of its divisors is an integer number (245670357240).

Almost surely, 2^{12401323242440} is an apocalyptic number.

12401323242440 is a gapful number since it is divisible by the number (10) 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 12401323242440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15722902863360).

12401323242440 is an abundant number, since it is smaller than the sum of its proper divisors (19044482484280).

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

12401323242440 is a wasteful number, since it uses less digits than its factorization.

12401323242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702343 (or 702339 counting only the distinct ones).

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

Adding to 12401323242440 its reverse (4424232310421), we get a palindrome (16825555552861).

The spelling of 12401323242440 in words is "twelve trillion, four hundred one billion, three hundred twenty-three million, two hundred forty-two thousand, four hundred forty".