421013131021 has 8 divisors (see below), whose sum is σ = 492347582144. Its totient is φ = 352476109440.

The previous prime is 421013130911. The next prime is 421013131057. The reversal of 421013131021 is 120131310124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421013131021 - 2⁷ = 421013130893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421013131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421013131421) 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 7 ways as a sum of consecutive naturals, for example, 699357060 + ... + 699357661.

It is an arithmetic number, because the mean of its divisors is an integer number (61543447768).

Almost surely, 2^421013131021 is an apocalyptic number.

It is an amenable number.

421013131021 is a deficient number, since it is larger than the sum of its proper divisors (71334451123).

421013131021 is a wasteful number, since it uses less digits than its factorization.

421013131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398714771.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 421013131021 its reverse (120131310124), we get a palindrome (541144441145).

The spelling of 421013131021 in words is "four hundred twenty-one billion, thirteen million, one hundred thirty-one thousand, twenty-one".