1421322342440 has 768 divisors, whose sum is σ = 4430547072000. Its totient is φ = 399218688000.

The previous prime is 1421322342437. The next prime is 1421322342449. The reversal of 1421322342440 is 442432231241.

It is a happy number.

It is a super-2 number, since 2×1421322342440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421322342397 and 1421322342406.

It is not an unprimeable number, because it can be changed into a prime (1421322342449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3959114981 + ... + 3959115339.

It is an arithmetic number, because the mean of its divisors is an integer number (5768941500).

Almost surely, 2^{1421322342440} is an apocalyptic number.

1421322342440 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 1421322342440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2215273536000).

1421322342440 is an abundant number, since it is smaller than the sum of its proper divisors (3009224729560).

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

1421322342440 is a wasteful number, since it uses less digits than its factorization.

1421322342440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 587 counting only the distinct ones).

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

Adding to 1421322342440 its reverse (442432231241), we get a palindrome (1863754573681).

The spelling of 1421322342440 in words is "one trillion, four hundred twenty-one billion, three hundred twenty-two million, three hundred forty-two thousand, four hundred forty".