223121144123 has 4 divisors (see below), whose sum is σ = 223392252048. Its totient is φ = 222850036200.

The previous prime is 223121144119. The next prime is 223121144143. The reversal of 223121144123 is 321441121322.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 223121144123 - 2² = 223121144119 is a prime.

It is a super-3 number, since 3×223121144123³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223121144092 and 223121144101.

It is not an unprimeable number, because it can be changed into a prime (223121144143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135552728 + ... + 135554373.

It is an arithmetic number, because the mean of its divisors is an integer number (55848063012).

Almost surely, 2^223121144123 is an apocalyptic number.

223121144123 is a deficient number, since it is larger than the sum of its proper divisors (271107925).

223121144123 is an equidigital number, since it uses as much as digits as its factorization.

223121144123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271107924.

The product of its digits is 2304, while the sum is 26.

Adding to 223121144123 its reverse (321441121322), we get a palindrome (544562265445).

The spelling of 223121144123 in words is "two hundred twenty-three billion, one hundred twenty-one million, one hundred forty-four thousand, one hundred twenty-three".