223402121 has 4 divisors (see below), whose sum is σ = 223628544. Its totient is φ = 223175700.

The previous prime is 223402103. The next prime is 223402129. The reversal of 223402121 is 121204322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223402121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223402121.

It is not an unprimeable number, because it can be changed into a prime (223402129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111725 + ... + 113706.

It is an arithmetic number, because the mean of its divisors is an integer number (55907136).

Almost surely, 2^223402121 is an apocalyptic number.

It is an amenable number.

223402121 is a deficient number, since it is larger than the sum of its proper divisors (226423).

223402121 is an equidigital number, since it uses as much as digits as its factorization.

223402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226422.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 223402121 is about 14946.6424657847. The cubic root of 223402121 is about 606.7769817440.

Adding to 223402121 its reverse (121204322), we get a palindrome (344606443).

The spelling of 223402121 in words is "two hundred twenty-three million, four hundred two thousand, one hundred twenty-one".