221021014 has 4 divisors (see below), whose sum is σ = 331531524. Its totient is φ = 110510506.

The previous prime is 221020957. The next prime is 221021033. The reversal of 221021014 is 410120122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 410120122 = 2 ⋅205060061.

It is a junction number, because it is equal to n+sod(n) for n = 221020985 and 221021003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255252 + ... + 55255255.

It is an arithmetic number, because the mean of its divisors is an integer number (82882881).

Almost surely, 2^221021014 is an apocalyptic number.

221021014 is a deficient number, since it is larger than the sum of its proper divisors (110510510).

221021014 is a wasteful number, since it uses less digits than its factorization.

221021014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110510509.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221021014 is about 14866.7755078228. The cubic root of 221021014 is about 604.6135218082.

Adding to 221021014 its reverse (410120122), we get a palindrome (631141136).

The spelling of 221021014 in words is "two hundred twenty-one million, twenty-one thousand, fourteen".