421121505474407 has 4 divisors (see below), whose sum is σ = 421166695043280. Its totient is φ = 421076315905536.

The previous prime is 421121505474379. The next prime is 421121505474541. The reversal of 421121505474407 is 704474505121124.

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

It is a cyclic number.

It is not a de Polignac number, because 421121505474407 - 2¹⁸ = 421121505212263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421121505473407) 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, 22594770458 + ... + 22594789095.

It is an arithmetic number, because the mean of its divisors is an integer number (105291673760820).

Almost surely, 2^{421121505474407} is an apocalyptic number.

421121505474407 is a deficient number, since it is larger than the sum of its proper divisors (45189568873).

421121505474407 is an equidigital number, since it uses as much as digits as its factorization.

421121505474407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45189568872.

The product of its (nonzero) digits is 1254400, while the sum is 47.

The spelling of 421121505474407 in words is "four hundred twenty-one trillion, one hundred twenty-one billion, five hundred five million, four hundred seventy-four thousand, four hundred seven".