221110401 has 8 divisors (see below), whose sum is σ = 298966464. Its totient is φ = 145330640.

The previous prime is 221110397. The next prime is 221110403. The reversal of 221110401 is 104011122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221110401 - 2² = 221110397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221110403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518826 + ... + 519251.

It is an arithmetic number, because the mean of its divisors is an integer number (37370808).

Almost surely, 2^221110401 is an apocalyptic number.

It is an amenable number.

221110401 is a deficient number, since it is larger than the sum of its proper divisors (77856063).

221110401 is a wasteful number, since it uses less digits than its factorization.

221110401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038151.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221110401 is about 14869.7814711582. The cubic root of 221110401 is about 604.6950182895.

Adding to 221110401 its reverse (104011122), we get a palindrome (325121523).

The spelling of 221110401 in words is "two hundred twenty-one million, one hundred ten thousand, four hundred one".