221101021223 has 4 divisors (see below), whose sum is σ = 221103122280. Its totient is φ = 221098920168.

The previous prime is 221101021177. The next prime is 221101021277. The reversal of 221101021223 is 322120101122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322120101122 = 2 ⋅161060050561.

It is a cyclic number.

It is not a de Polignac number, because 221101021223 - 2¹⁰ = 221101020199 is a prime.

It is a super-4 number, since 4×221101021223⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101024223) 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, 883865 + ... + 1106082.

It is an arithmetic number, because the mean of its divisors is an integer number (55275780570).

Almost surely, 2^221101021223 is an apocalyptic number.

221101021223 is a deficient number, since it is larger than the sum of its proper divisors (2101057).

221101021223 is a wasteful number, since it uses less digits than its factorization.

221101021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101056.

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

Adding to 221101021223 its reverse (322120101122), we get a palindrome (543221122345).

The spelling of 221101021223 in words is "two hundred twenty-one billion, one hundred one million, twenty-one thousand, two hundred twenty-three".