221104134 has 16 divisors (see below), whose sum is σ = 491342640. Its totient is φ = 73701360.

The previous prime is 221104133. The next prime is 221104171. The reversal of 221104134 is 431401122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221104133) 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, 2047207 + ... + 2047314.

It is an arithmetic number, because the mean of its divisors is an integer number (30708915).

Almost surely, 2^221104134 is an apocalyptic number.

221104134 is an abundant number, since it is smaller than the sum of its proper divisors (270238506).

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

221104134 is a wasteful number, since it uses less digits than its factorization.

221104134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094532 (or 4094526 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 221104134 is about 14869.5707402736. The cubic root of 221104134 is about 604.6893052167.

Adding to 221104134 its reverse (431401122), we get a palindrome (652505256).

It can be divided in two parts, 22110 and 4134, that added together give a square (26244 = 162²).

The spelling of 221104134 in words is "two hundred twenty-one million, one hundred four thousand, one hundred thirty-four".