1421140420443 has 4 divisors (see below), whose sum is σ = 1894853893928. Its totient is φ = 947426946960.

The previous prime is 1421140420433. The next prime is 1421140420451. The reversal of 1421140420443 is 3440240411241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1421140420443 - 2⁵ = 1421140420411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421140420443.

It is not an unprimeable number, because it can be changed into a prime (1421140420433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236856736738 + ... + 236856736743.

It is an arithmetic number, because the mean of its divisors is an integer number (473713473482).

Almost surely, 2^{1421140420443} is an apocalyptic number.

1421140420443 is a deficient number, since it is larger than the sum of its proper divisors (473713473485).

1421140420443 is an equidigital number, since it uses as much as digits as its factorization.

1421140420443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473713473484.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 1421140420443 its reverse (3440240411241), we get a palindrome (4861380831684).

The spelling of 1421140420443 in words is "one trillion, four hundred twenty-one billion, one hundred forty million, four hundred twenty thousand, four hundred forty-three".