421333421755 has 4 divisors (see below), whose sum is σ = 505600106112. Its totient is φ = 337066737400.

The previous prime is 421333421701. The next prime is 421333421771. The reversal of 421333421755 is 557124333124.

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

It is not a de Polignac number, because 421333421755 - 2²³ = 421325033147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42133342171 + ... + 42133342180.

It is an arithmetic number, because the mean of its divisors is an integer number (126400026528).

Almost surely, 2^421333421755 is an apocalyptic number.

421333421755 is a deficient number, since it is larger than the sum of its proper divisors (84266684357).

421333421755 is an equidigital number, since it uses as much as digits as its factorization.

421333421755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84266684356.

The product of its digits is 302400, while the sum is 40.

Adding to 421333421755 its reverse (557124333124), we get a palindrome (978457754879).

The spelling of 421333421755 in words is "four hundred twenty-one billion, three hundred thirty-three million, four hundred twenty-one thousand, seven hundred fifty-five".