421672341121 has 4 divisors (see below), whose sum is σ = 423482093892. Its totient is φ = 419862588352.

The previous prime is 421672341067. The next prime is 421672341131. The reversal of 421672341121 is 121143276124.

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 125666705025 + 296005636096 = 354495^2 + 544064^2 .

It is a cyclic number.

It is not a de Polignac number, because 421672341121 - 2¹¹ = 421672339073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421672341131) 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, 904876036 + ... + 904876501.

It is an arithmetic number, because the mean of its divisors is an integer number (105870523473).

Almost surely, 2^421672341121 is an apocalyptic number.

It is an amenable number.

421672341121 is a deficient number, since it is larger than the sum of its proper divisors (1809752771).

421672341121 is a wasteful number, since it uses less digits than its factorization.

421672341121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809752770.

The product of its digits is 16128, while the sum is 34.

The spelling of 421672341121 in words is "four hundred twenty-one billion, six hundred seventy-two million, three hundred forty-one thousand, one hundred twenty-one".