221313124 has 12 divisors (see below), whose sum is σ = 393647548. Its totient is φ = 108842400.

The previous prime is 221313101. The next prime is 221313133. The reversal of 221313124 is 421313122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53144100 + 168169024 = 7290^2 + 12968^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 453267 + ... + 453754.

Almost surely, 2^221313124 is an apocalyptic number.

It is an amenable number.

221313124 is a deficient number, since it is larger than the sum of its proper divisors (172334424).

221313124 is a wasteful number, since it uses less digits than its factorization.

221313124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907086 (or 907084 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 221313124 is about 14876.5965193656. The cubic root of 221313124 is about 604.8797648277.

Adding to 221313124 its reverse (421313122), we get a palindrome (642626246).

The spelling of 221313124 in words is "two hundred twenty-one million, three hundred thirteen thousand, one hundred twenty-four".