420211111 has 4 divisors (see below), whose sum is σ = 420275224. Its totient is φ = 420147000.

The previous prime is 420211063. The next prime is 420211153. The reversal of 420211111 is 111112024.

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 420211111 - 2¹¹ = 420209063 is a prime.

It is a Duffinian number.

420211111 is a modest number, since divided by 11111 gives 4202 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 420211091 and 420211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420211811) 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, 20940 + ... + 35761.

It is an arithmetic number, because the mean of its divisors is an integer number (105068806).

Almost surely, 2^420211111 is an apocalyptic number.

420211111 is a deficient number, since it is larger than the sum of its proper divisors (64113).

420211111 is an equidigital number, since it uses as much as digits as its factorization.

420211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64112.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 420211111 is about 20499.0514658606. The cubic root of 420211111 is about 749.0126925727.

Adding to 420211111 its reverse (111112024), we get a palindrome (531323135).

The spelling of 420211111 in words is "four hundred twenty million, two hundred eleven thousand, one hundred eleven".