223121100211123 has 4 divisors (see below), whose sum is σ = 223126026863320. Its totient is φ = 223116173558928.

The previous prime is 223121100211099. The next prime is 223121100211189. The reversal of 223121100211123 is 321112001121322.

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 223121100211123 - 2⁵ = 223121100211091 is a prime.

It is a super-3 number, since 3×223121100211123³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223121100211094 and 223121100211103.

It is not an unprimeable number, because it can be changed into a prime (223121100218123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463258165 + ... + 2463348742.

It is an arithmetic number, because the mean of its divisors is an integer number (55781506715830).

Almost surely, 2^{223121100211123} is an apocalyptic number.

223121100211123 is a deficient number, since it is larger than the sum of its proper divisors (4926652197).

223121100211123 is an equidigital number, since it uses as much as digits as its factorization.

223121100211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4926652196.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 223121100211123 its reverse (321112001121322), we get a palindrome (544233101332445).

The spelling of 223121100211123 in words is "two hundred twenty-three trillion, one hundred twenty-one billion, one hundred million, two hundred eleven thousand, one hundred twenty-three".