1421320104400 has 120 divisors (see below), whose sum is σ = 3915009504704. Its totient is φ = 485752550400.

The previous prime is 1421320104397. The next prime is 1421320104401. The reversal of 1421320104400 is 44010231241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421320104401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65515 + ... + 1687285.

Almost surely, 2^{1421320104400} is an apocalyptic number.

1421320104400 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 1421320104400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957504752352).

1421320104400 is an abundant number, since it is smaller than the sum of its proper divisors (2493689400304).

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

1421320104400 is a wasteful number, since it uses less digits than its factorization.

1421320104400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622109 (or 1622098 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1421320104400 its reverse (44010231241), we get a palindrome (1465330335641).

The spelling of 1421320104400 in words is "one trillion, four hundred twenty-one billion, three hundred twenty million, one hundred four thousand, four hundred".