221401411 has 16 divisors (see below), whose sum is σ = 284940288. Its totient is φ = 166953600.

The previous prime is 221401379. The next prime is 221401417. The reversal of 221401411 is 114104122.

It is a happy number.

It is not a de Polignac number, because 221401411 - 2⁵ = 221401379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221401417) 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, 43990 + ... + 48763.

It is an arithmetic number, because the mean of its divisors is an integer number (17808768).

Almost surely, 2^221401411 is an apocalyptic number.

221401411 is a deficient number, since it is larger than the sum of its proper divisors (63538877).

221401411 is a wasteful number, since it uses less digits than its factorization.

221401411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92802.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 221401411 is about 14879.5635352654. The cubic root of 221401411 is about 604.9601877133.

Adding to 221401411 its reverse (114104122), we get a palindrome (335505533).

The spelling of 221401411 in words is "two hundred twenty-one million, four hundred one thousand, four hundred eleven".