221101040 has 20 divisors (see below), whose sum is σ = 514060104. Its totient is φ = 88440384.

The previous prime is 221101039. The next prime is 221101061. The reversal of 221101040 is 40101122.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1381802 + ... + 1381961.

Almost surely, 2^221101040 is an apocalyptic number.

221101040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101040 is an abundant number, since it is smaller than the sum of its proper divisors (292959064).

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

221101040 is a wasteful number, since it uses less digits than its factorization.

221101040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763776 (or 2763770 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221101040 is about 14869.4667019366. The cubic root of 221101040 is about 604.6864846491.

Adding to 221101040 its reverse (40101122), we get a palindrome (261202162).

The spelling of 221101040 in words is "two hundred twenty-one million, one hundred one thousand, forty".