421143544322 has 18 divisors (see below), whose sum is σ = 671085768603. Its totient is φ = 198177855232.

The previous prime is 421143544303. The next prime is 421143544331. The reversal of 421143544322 is 223445341124.

It can be written as a sum of positive squares in 5 ways, for example, as 100743394801 + 320400149521 = 317401^2 + 566039^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=458881.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15588458 + ... + 15615450.

Almost surely, 2^421143544322 is an apocalyptic number.

421143544322 is a deficient number, since it is larger than the sum of its proper divisors (249942224281).

421143544322 is an frugal number, since it uses more digits than its factorization.

421143544322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54022 (or 27012 counting only the distinct ones).

The product of its digits is 92160, while the sum is 35.

Adding to 421143544322 its reverse (223445341124), we get a palindrome (644588885446).

The spelling of 421143544322 in words is "four hundred twenty-one billion, one hundred forty-three million, five hundred forty-four thousand, three hundred twenty-two".