421323211541 has 4 divisors (see below), whose sum is σ = 426057180300. Its totient is φ = 416589242784.

The previous prime is 421323211399. The next prime is 421323211553. The reversal of 421323211541 is 145112323124.

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 63539789041 + 357783422500 = 252071^2 + 598150^2 .

It is a cyclic number.

It is not a de Polignac number, because 421323211541 - 2¹⁴ = 421323195157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421323211741) 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, 2366984246 + ... + 2366984423.

It is an arithmetic number, because the mean of its divisors is an integer number (106514295075).

Almost surely, 2^421323211541 is an apocalyptic number.

It is an amenable number.

421323211541 is a deficient number, since it is larger than the sum of its proper divisors (4733968759).

421323211541 is an equidigital number, since it uses as much as digits as its factorization.

421323211541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733968758.

The product of its digits is 5760, while the sum is 29.

Adding to 421323211541 its reverse (145112323124), we get a palindrome (566435534665).

The spelling of 421323211541 in words is "four hundred twenty-one billion, three hundred twenty-three million, two hundred eleven thousand, five hundred forty-one".