401421420013 has 4 divisors (see below), whose sum is σ = 401430532060. Its totient is φ = 401412307968.

The previous prime is 401421419977. The next prime is 401421420047. The reversal of 401421420013 is 310024124104.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 267514459524 + 133906960489 = 517218^2 + 365933^2 .

It is a cyclic number.

It is not a de Polignac number, because 401421420013 - 2⁹ = 401421419501 is a prime.

It is a super-2 number, since 2×401421420013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401421420073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4489620 + ... + 4578157.

It is an arithmetic number, because the mean of its divisors is an integer number (100357633015).

Almost surely, 2^401421420013 is an apocalyptic number.

It is an amenable number.

401421420013 is a deficient number, since it is larger than the sum of its proper divisors (9112047).

401421420013 is an equidigital number, since it uses as much as digits as its factorization.

401421420013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112046.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 401421420013 its reverse (310024124104), we get a palindrome (711445544117).

The spelling of 401421420013 in words is "four hundred one billion, four hundred twenty-one million, four hundred twenty thousand, thirteen".