221105233401 has 16 divisors (see below), whose sum is σ = 317711452800. Its totient is φ = 135967466880.

The previous prime is 221105233387. The next prime is 221105233441. The reversal of 221105233401 is 104332501122.

It is not a de Polignac number, because 221105233401 - 2⁵ = 221105233369 is a prime.

It is a super-3 number, since 3×221105233401³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (221105233441) 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, 1971660 + ... + 2080781.

It is an arithmetic number, because the mean of its divisors is an integer number (19856965800).

Almost surely, 2^221105233401 is an apocalyptic number.

It is an amenable number.

221105233401 is a deficient number, since it is larger than the sum of its proper divisors (96606219399).

221105233401 is a wasteful number, since it uses less digits than its factorization.

221105233401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053856.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 221105233401 its reverse (104332501122), we get a palindrome (325437734523).

The spelling of 221105233401 in words is "two hundred twenty-one billion, one hundred five million, two hundred thirty-three thousand, four hundred one".