221042134 has 4 divisors (see below), whose sum is σ = 331563204. Its totient is φ = 110521066.

The previous prime is 221042119. The next prime is 221042137. The reversal of 221042134 is 431240122.

221042134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221042137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55260532 + ... + 55260535.

It is an arithmetic number, because the mean of its divisors is an integer number (82890801).

Almost surely, 2^221042134 is an apocalyptic number.

221042134 is a deficient number, since it is larger than the sum of its proper divisors (110521070).

221042134 is a wasteful number, since it uses less digits than its factorization.

221042134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110521069.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221042134 is about 14867.4857995560. The cubic root of 221042134 is about 604.6327794505.

Adding to 221042134 its reverse (431240122), we get a palindrome (652282256).

It can be divided in two parts, 2210 and 42134, that added together give a palindrome (44344).

The spelling of 221042134 in words is "two hundred twenty-one million, forty-two thousand, one hundred thirty-four".