421432220331013 has 4 divisors (see below), whose sum is σ = 421451213197420. Its totient is φ = 421413227464608.

The previous prime is 421432220331011. The next prime is 421432220331071. The reversal of 421432220331013 is 310133022234124.

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 269927583057729 + 151504637273284 = 16429473^2 + 12308722^2 .

It is a cyclic number.

It is not a de Polignac number, because 421432220331013 - 2¹ = 421432220331011 is a prime.

It is a super-3 number, since 3×421432220331013³ (a number of 45 digits) contains 333 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 (421432220331011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9496399920 + ... + 9496444297.

It is an arithmetic number, because the mean of its divisors is an integer number (105362803299355).

Almost surely, 2^{421432220331013} is an apocalyptic number.

It is an amenable number.

421432220331013 is a deficient number, since it is larger than the sum of its proper divisors (18992866407).

421432220331013 is a wasteful number, since it uses less digits than its factorization.

421432220331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18992866406.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 421432220331013 its reverse (310133022234124), we get a palindrome (731565242565137).

The spelling of 421432220331013 in words is "four hundred twenty-one trillion, four hundred thirty-two billion, two hundred twenty million, three hundred thirty-one thousand, thirteen".