404220111 has 16 divisors (see below), whose sum is σ = 552718080. Its totient is φ = 262687040.

The previous prime is 404220109. The next prime is 404220119. The reversal of 404220111 is 111022404.

It is a cyclic number.

It is not a de Polignac number, because 404220111 - 2¹ = 404220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404220119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (34544880).

Almost surely, 2^404220111 is an apocalyptic number.

404220111 is a deficient number, since it is larger than the sum of its proper divisors (148497969).

404220111 is a wasteful number, since it uses less digits than its factorization.

404220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 404220111 is about 20105.2259624208. The cubic root of 404220111 is about 739.3884105529.

Adding to 404220111 its reverse (111022404), we get a palindrome (515242515).

The spelling of 404220111 in words is "four hundred four million, two hundred twenty thousand, one hundred eleven".