421266335513 has 4 divisors (see below), whose sum is σ = 439582263168. Its totient is φ = 402950407860.

The previous prime is 421266335471. The next prime is 421266335531. The reversal of 421266335513 is 315533662124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421266335513 - 2⁸ = 421266335257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421266305513) 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, 9157963793 + ... + 9157963838.

It is an arithmetic number, because the mean of its divisors is an integer number (109895565792).

Almost surely, 2^421266335513 is an apocalyptic number.

It is an amenable number.

421266335513 is a deficient number, since it is larger than the sum of its proper divisors (18315927655).

421266335513 is a wasteful number, since it uses less digits than its factorization.

421266335513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315927654.

The product of its digits is 388800, while the sum is 41.

Adding to 421266335513 its reverse (315533662124), we get a palindrome (736799997637).

The spelling of 421266335513 in words is "four hundred twenty-one billion, two hundred sixty-six million, three hundred thirty-five thousand, five hundred thirteen".