221126642 has 8 divisors (see below), whose sum is σ = 361843632. Its totient is φ = 100512100.

The previous prime is 221126639. The next prime is 221126651. The reversal of 221126642 is 246621122.

221126642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025584 + ... + 5025627.

It is an arithmetic number, because the mean of its divisors is an integer number (45230454).

Almost surely, 2^221126642 is an apocalyptic number.

221126642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221126642 is a deficient number, since it is larger than the sum of its proper divisors (140716990).

221126642 is a wasteful number, since it uses less digits than its factorization.

221126642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051224.

The product of its digits is 2304, while the sum is 26.

The square root of 221126642 is about 14870.3275686852. The cubic root of 221126642 is about 604.7098232788.

Adding to 221126642 its reverse (246621122), we get a palindrome (467747764).

The spelling of 221126642 in words is "two hundred twenty-one million, one hundred twenty-six thousand, six hundred forty-two".