421455125011 has 4 divisors (see below), whose sum is σ = 431256407032. Its totient is φ = 411653842992.

The previous prime is 421455124999. The next prime is 421455125017. The reversal of 421455125011 is 110521554124.

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 421455125011 - 2²⁵ = 421421570579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421455125017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4900640946 + ... + 4900641031.

It is an arithmetic number, because the mean of its divisors is an integer number (107814101758).

Almost surely, 2^421455125011 is an apocalyptic number.

421455125011 is a deficient number, since it is larger than the sum of its proper divisors (9801282021).

421455125011 is an equidigital number, since it uses as much as digits as its factorization.

421455125011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9801282020.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 421455125011 its reverse (110521554124), we get a palindrome (531976679135).

The spelling of 421455125011 in words is "four hundred twenty-one billion, four hundred fifty-five million, one hundred twenty-five thousand, eleven".