222103721 has 24 divisors (see below), whose sum is σ = 269325000. Its totient is φ = 182402304.

The previous prime is 222103703. The next prime is 222103751. The reversal of 222103721 is 127301222.

It can be written as a sum of positive squares in 4 ways, for example, as 37687321 + 184416400 = 6139^2 + 13580^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222103721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222103693 and 222103702.

It is not an unprimeable number, because it can be changed into a prime (222103751) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 211205 + ... + 212253.

It is an arithmetic number, because the mean of its divisors is an integer number (11221875).

Almost surely, 2^222103721 is an apocalyptic number.

It is an amenable number.

222103721 is a deficient number, since it is larger than the sum of its proper divisors (47221279).

222103721 is a wasteful number, since it uses less digits than its factorization.

222103721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 222103721 is about 14903.1446681564. The cubic root of 222103721 is about 605.5991796284.

Adding to 222103721 its reverse (127301222), we get a palindrome (349404943).

The spelling of 222103721 in words is "two hundred twenty-two million, one hundred three thousand, seven hundred twenty-one".