221222003 has 4 divisors (see below), whose sum is σ = 234235080. Its totient is φ = 208208928.

The previous prime is 221221967. The next prime is 221222009. The reversal of 221222003 is 300222122.

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

It is not a de Polignac number, because 221222003 - 2⁸ = 221221747 is a prime.

It is a super-2 number, since 2×221222003² = 97878349222664018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221222009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506513 + ... + 6506546.

It is an arithmetic number, because the mean of its divisors is an integer number (58558770).

Almost surely, 2^221222003 is an apocalyptic number.

221222003 is a deficient number, since it is larger than the sum of its proper divisors (13013077).

221222003 is a wasteful number, since it uses less digits than its factorization.

221222003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013076.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 221222003 is about 14873.5336420099. The cubic root of 221222003 is about 604.7967379467.

Adding to 221222003 its reverse (300222122), we get a palindrome (521444125).

The spelling of 221222003 in words is "two hundred twenty-one million, two hundred twenty-two thousand, three".