221101404 has 24 divisors (see below), whose sum is σ = 543056640. Its totient is φ = 69821424.

The previous prime is 221101403. The next prime is 221101417. The reversal of 221101404 is 404101122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484644 + ... + 485099.

It is an arithmetic number, because the mean of its divisors is an integer number (22627360).

Almost surely, 2^221101404 is an apocalyptic number.

It is an amenable number.

221101404 is an abundant number, since it is smaller than the sum of its proper divisors (321955236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221101404 is a wasteful number, since it uses less digits than its factorization.

221101404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969769 (or 969767 counting only the distinct ones).

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

The square root of 221101404 is about 14869.4789417787. The cubic root of 221101404 is about 604.6868164819.

Adding to 221101404 its reverse (404101122), we get a palindrome (625202526).

The spelling of 221101404 in words is "two hundred twenty-one million, one hundred one thousand, four hundred four".