221220100221223 has 4 divisors (see below), whose sum is σ = 222629145445720. Its totient is φ = 219811054996728.

The previous prime is 221220100221191. The next prime is 221220100221277. The reversal of 221220100221223 is 322122001022122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221220100221223 - 2⁵ = 221220100221191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220100221194 and 221220100221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220100221823) 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, 704522612013 + ... + 704522612326.

It is an arithmetic number, because the mean of its divisors is an integer number (55657286361430).

Almost surely, 2^{221220100221223} is an apocalyptic number.

221220100221223 is a deficient number, since it is larger than the sum of its proper divisors (1409045224497).

221220100221223 is a wasteful number, since it uses less digits than its factorization.

221220100221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409045224496.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221220100221223 its reverse (322122001022122), we get a palindrome (543342101243345).

The spelling of 221220100221223 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-three".