223123120105 has 4 divisors (see below), whose sum is σ = 267747744132. Its totient is φ = 178498496080.

The previous prime is 223123120063. The next prime is 223123120127. The reversal of 223123120105 is 501021321322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138332668761 + 84790451344 = 371931^2 + 291188^2 .

It is not a de Polignac number, because 223123120105 - 2²¹ = 223121022953 is a prime.

It is a super-3 number, since 3×223123120105³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22312312006 + ... + 22312312015.

It is an arithmetic number, because the mean of its divisors is an integer number (66936936033).

Almost surely, 2^223123120105 is an apocalyptic number.

It is an amenable number.

223123120105 is a deficient number, since it is larger than the sum of its proper divisors (44624624027).

223123120105 is an equidigital number, since it uses as much as digits as its factorization.

223123120105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44624624026.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 223123120105 its reverse (501021321322), we get a palindrome (724144441427).

The spelling of 223123120105 in words is "two hundred twenty-three billion, one hundred twenty-three million, one hundred twenty thousand, one hundred five".