223121100221 has 8 divisors (see below), whose sum is σ = 223305614400. Its totient is φ = 222936667200.

The previous prime is 223121100179. The next prime is 223121100229. The reversal of 223121100221 is 122001121322.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223121100221 is a prime.

It is a super-3 number, since 3×223121100221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121100229) 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, 6255125 + ... + 6290693.

It is an arithmetic number, because the mean of its divisors is an integer number (27913201800).

Almost surely, 2^223121100221 is an apocalyptic number.

It is an amenable number.

223121100221 is a deficient number, since it is larger than the sum of its proper divisors (184514179).

223121100221 is a wasteful number, since it uses less digits than its factorization.

223121100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40579.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 223121100221 its reverse (122001121322), we get a palindrome (345122221543).

The spelling of 223121100221 in words is "two hundred twenty-three billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".