421400345024243 has 4 divisors (see below), whose sum is σ = 453815756179968. Its totient is φ = 388984933868520.

The previous prime is 421400345024227. The next prime is 421400345024249. The reversal of 421400345024243 is 342420543004124.

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

It is a cyclic number.

It is not a de Polignac number, because 421400345024243 - 2⁴ = 421400345024227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421400345024197 and 421400345024206.

It is not an unprimeable number, because it can be changed into a prime (421400345024249) 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, 16207705577843 + ... + 16207705577868.

It is an arithmetic number, because the mean of its divisors is an integer number (113453939044992).

Almost surely, 2^{421400345024243} is an apocalyptic number.

421400345024243 is a deficient number, since it is larger than the sum of its proper divisors (32415411155725).

421400345024243 is a wasteful number, since it uses less digits than its factorization.

421400345024243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32415411155724.

The product of its (nonzero) digits is 368640, while the sum is 38.

Adding to 421400345024243 its reverse (342420543004124), we get a palindrome (763820888028367).

The spelling of 421400345024243 in words is "four hundred twenty-one trillion, four hundred billion, three hundred forty-five million, twenty-four thousand, two hundred forty-three".