1321421343144 has 128 divisors (see below), whose sum is σ = 3791019939840. Its totient is φ = 375997485312.

The previous prime is 1321421343133. The next prime is 1321421343157. The reversal of 1321421343144 is 4413431241231.

It is a happy number.

It is a super-2 number, since 2×1321421343144² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 93797269 + ... + 93811355.

It is an arithmetic number, because the mean of its divisors is an integer number (29617343280).

Almost surely, 2^{1321421343144} is an apocalyptic number.

1321421343144 is a gapful number since it is divisible by the number (14) 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 1321421343144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895509969920).

1321421343144 is an abundant number, since it is smaller than the sum of its proper divisors (2469598596696).

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

1321421343144 is a wasteful number, since it uses less digits than its factorization.

1321421343144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16359 (or 16355 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

Adding to 1321421343144 its reverse (4413431241231), we get a palindrome (5734852584375).

The spelling of 1321421343144 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, one hundred forty-four".