421111205 has 16 divisors (see below), whose sum is σ = 519737904. Its totient is φ = 327352320.

The previous prime is 421111183. The next prime is 421111213. The reversal of 421111205 is 502111124.

It can be written as a sum of positive squares in 8 ways, for example, as 28793956 + 392317249 = 5366^2 + 19807^2 .

It is not a de Polignac number, because 421111205 - 2¹⁰ = 421110181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48689 + ... + 56681.

It is an arithmetic number, because the mean of its divisors is an integer number (32483619).

Almost surely, 2^421111205 is an apocalyptic number.

It is an amenable number.

421111205 is a deficient number, since it is larger than the sum of its proper divisors (98626699).

421111205 is a wasteful number, since it uses less digits than its factorization.

421111205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8296.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 421111205 is about 20520.9942497921. The cubic root of 421111205 is about 749.5471073134.

Adding to 421111205 its reverse (502111124), we get a palindrome (923222329).

The spelling of 421111205 in words is "four hundred twenty-one million, one hundred eleven thousand, two hundred five".