223121302123 has 2 divisors, whose sum is σ = 223121302124. Its totient is φ = 223121302122.

The previous prime is 223121302111. The next prime is 223121302133. The reversal of 223121302123 is 321203121322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223121302123 - 2²⁹ = 222584431211 is a prime.

It is a super-3 number, since 3×223121302123³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 223121302094 and 223121302103.

It is not a weakly prime, because it can be changed into another prime (223121302133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560651061 + 111560651062.

It is an arithmetic number, because the mean of its divisors is an integer number (111560651062).

Almost surely, 2^223121302123 is an apocalyptic number.

223121302123 is a deficient number, since it is larger than the sum of its proper divisors (1).

223121302123 is an equidigital number, since it uses as much as digits as its factorization.

223121302123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 223121302123 its reverse (321203121322), we get a palindrome (544324423445).

The spelling of 223121302123 in words is "two hundred twenty-three billion, one hundred twenty-one million, three hundred two thousand, one hundred twenty-three".