223121023409 has 2 divisors, whose sum is σ = 223121023410. Its totient is φ = 223121023408.

The previous prime is 223121023381. The next prime is 223121023429. The reversal of 223121023409 is 904320121322.

It is a happy number.

223121023409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220749625600 + 2371397809 = 469840^2 + 48697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223121023409 is a prime.

It is a super-3 number, since 3×223121023409³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (223121023429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560511704 + 111560511705.

It is an arithmetic number, because the mean of its divisors is an integer number (111560511705).

Almost surely, 2^223121023409 is an apocalyptic number.

It is an amenable number.

223121023409 is a deficient number, since it is larger than the sum of its proper divisors (1).

223121023409 is an equidigital number, since it uses as much as digits as its factorization.

223121023409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 223121023409 in words is "two hundred twenty-three billion, one hundred twenty-one million, twenty-three thousand, four hundred nine".