223121401 has 8 divisors (see below), whose sum is σ = 224399880. Its totient is φ = 221847168.

The previous prime is 223121399. The next prime is 223121407. The reversal of 223121401 is 104121322.

It can be written as a sum of positive squares in 4 ways, for example, as 1081600 + 222039801 = 1040^2 + 14901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223121401 - 2¹ = 223121399 is a prime.

It is a super-3 number, since 3×223121401³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223121407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179755 + ... + 180991.

It is an arithmetic number, because the mean of its divisors is an integer number (28049985).

Almost surely, 2^223121401 is an apocalyptic number.

It is an amenable number.

223121401 is a deficient number, since it is larger than the sum of its proper divisors (1278479).

223121401 is a wasteful number, since it uses less digits than its factorization.

223121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 223121401 is about 14937.2487761301. The cubic root of 223121401 is about 606.5227229974.

Adding to 223121401 its reverse (104121322), we get a palindrome (327242723).

It can be divided in two parts, 2231 and 21401, that added together give a palindrome (23632).

The spelling of 223121401 in words is "two hundred twenty-three million, one hundred twenty-one thousand, four hundred one".