2221003123 has 4 divisors (see below), whose sum is σ = 2228009760. Its totient is φ = 2213996488.

The previous prime is 2221003121. The next prime is 2221003133. The reversal of 2221003123 is 3213001222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3213001222 = 2 ⋅1606500611.

It is a cyclic number.

It is not a de Polignac number, because 2221003123 - 2¹ = 2221003121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221003097 and 2221003106.

It is not an unprimeable number, because it can be changed into a prime (2221003121) 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, 3502843 + ... + 3503476.

It is an arithmetic number, because the mean of its divisors is an integer number (557002440).

Almost surely, 2^2221003123 is an apocalyptic number.

2221003123 is a deficient number, since it is larger than the sum of its proper divisors (7006637).

2221003123 is an equidigital number, since it uses as much as digits as its factorization.

2221003123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006636.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2221003123 is about 47127.5198053112. The cubic root of 2221003123 is about 1304.7172061343.

Adding to 2221003123 its reverse (3213001222), we get a palindrome (5434004345).

The spelling of 2221003123 in words is "two billion, two hundred twenty-one million, three thousand, one hundred twenty-three".