421025138303 has 16 divisors (see below), whose sum is σ = 528257877504. Its totient is φ = 325981899360.

The previous prime is 421025138279. The next prime is 421025138311. The reversal of 421025138303 is 303831520124.

It is a cyclic number.

It is not a de Polignac number, because 421025138303 - 2¹⁰ = 421025137279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421025138303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421025138323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17401475 + ... + 17425652.

It is an arithmetic number, because the mean of its divisors is an integer number (33016117344).

Almost surely, 2^421025138303 is an apocalyptic number.

421025138303 is a deficient number, since it is larger than the sum of its proper divisors (107232739201).

421025138303 is a wasteful number, since it uses less digits than its factorization.

421025138303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34827302.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 421025138303 its reverse (303831520124), we get a palindrome (724856658427).

The spelling of 421025138303 in words is "four hundred twenty-one billion, twenty-five million, one hundred thirty-eight thousand, three hundred three".