421021323304421 has 4 divisors (see below), whose sum is σ = 481167226633632. Its totient is φ = 360875419975212.

The previous prime is 421021323304403. The next prime is 421021323304487. The reversal of 421021323304421 is 124403323120124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421021323304421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421021323304121) 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, 30072951664595 + ... + 30072951664608.

It is an arithmetic number, because the mean of its divisors is an integer number (120291806658408).

Almost surely, 2^{421021323304421} is an apocalyptic number.

It is an amenable number.

421021323304421 is a deficient number, since it is larger than the sum of its proper divisors (60145903329211).

421021323304421 is an equidigital number, since it uses as much as digits as its factorization.

421021323304421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60145903329210.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 421021323304421 its reverse (124403323120124), we get a palindrome (545424646424545).

The spelling of 421021323304421 in words is "four hundred twenty-one trillion, twenty-one billion, three hundred twenty-three million, three hundred four thousand, four hundred twenty-one".