421205383502123 has 8 divisors (see below), whose sum is σ = 464233862230320. Its totient is φ = 378966418145280.

The previous prime is 421205383502063. The next prime is 421205383502171. The reversal of 421205383502123 is 321205383502124.

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

It is a cyclic number.

It is not a de Polignac number, because 421205383502123 - 2¹⁰ = 421205383501099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421205383522123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197378341718 + ... + 197378343851.

It is an arithmetic number, because the mean of its divisors is an integer number (58029232778790).

Almost surely, 2^{421205383502123} is an apocalyptic number.

421205383502123 is a deficient number, since it is larger than the sum of its proper divisors (43028478728197).

421205383502123 is a wasteful number, since it uses less digits than its factorization.

421205383502123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394756685677.

The product of its (nonzero) digits is 345600, while the sum is 41.

Subtracting from 421205383502123 its reverse (321205383502124), we obtain a palindrome (99999999999999).

The spelling of 421205383502123 in words is "four hundred twenty-one trillion, two hundred five billion, three hundred eighty-three million, five hundred two thousand, one hundred twenty-three".