2223123121 has 16 divisors (see below), whose sum is σ = 2353397760. Its totient is φ = 2095750800.

The previous prime is 2223123083. The next prime is 2223123131. The reversal of 2223123121 is 1213213222.

It is not a de Polignac number, because 2223123121 - 2⁹ = 2223122609 is a prime.

It is a super-2 number, since 2×2223123121² = 9884552822249561282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2223123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930896 + ... + 1932046.

It is an arithmetic number, because the mean of its divisors is an integer number (147087360).

Almost surely, 2^2223123121 is an apocalyptic number.

It is an amenable number.

2223123121 is a deficient number, since it is larger than the sum of its proper divisors (130274639).

2223123121 is a wasteful number, since it uses less digits than its factorization.

2223123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

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

The square root of 2223123121 is about 47150.0065853654. The cubic root of 2223123121 is about 1305.1322015383.

Adding to 2223123121 its reverse (1213213222), we get a palindrome (3436336343).

The spelling of 2223123121 in words is "two billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred twenty-one".