223121023421 has 8 divisors (see below), whose sum is σ = 240592632000. Its totient is φ = 206222254560.

The previous prime is 223121023409. The next prime is 223121023429. The reversal of 223121023421 is 124320121322.

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 223121023421 - 2¹⁴ = 223121007037 is a prime.

It is a super-3 number, since 3×223121023421³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121023429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143209121 + ... + 143210678.

It is an arithmetic number, because the mean of its divisors is an integer number (30074079000).

Almost surely, 2^223121023421 is an apocalyptic number.

It is an amenable number.

223121023421 is a deficient number, since it is larger than the sum of its proper divisors (17471608579).

223121023421 is a wasteful number, since it uses less digits than its factorization.

223121023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286419859.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 223121023421 its reverse (124320121322), we get a palindrome (347441144743).

The spelling of 223121023421 in words is "two hundred twenty-three billion, one hundred twenty-one million, twenty-three thousand, four hundred twenty-one".