421421413243 has 8 divisors (see below), whose sum is σ = 443100911616. Its totient is φ = 400021650600.

The previous prime is 421421413229. The next prime is 421421413261. The reversal of 421421413243 is 342314124124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421421413243 - 2²¹ = 421419316091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421421413223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69930843 + ... + 69936868.

It is an arithmetic number, because the mean of its divisors is an integer number (55387613952).

Almost surely, 2^421421413243 is an apocalyptic number.

421421413243 is a deficient number, since it is larger than the sum of its proper divisors (21679498373).

421421413243 is a wasteful number, since it uses less digits than its factorization.

421421413243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139867865.

The product of its digits is 18432, while the sum is 31.

Adding to 421421413243 its reverse (342314124124), we get a palindrome (763735537367).

The spelling of 421421413243 in words is "four hundred twenty-one billion, four hundred twenty-one million, four hundred thirteen thousand, two hundred forty-three".