221211001223 has 8 divisors (see below), whose sum is σ = 221947829376. Its totient is φ = 220474337400.

The previous prime is 221211001133. The next prime is 221211001259. The reversal of 221211001223 is 322100112122.

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-221211001223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211001723) 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, 3037628 + ... + 3109598.

It is an arithmetic number, because the mean of its divisors is an integer number (27743478672).

Almost surely, 2^221211001223 is an apocalyptic number.

221211001223 is a deficient number, since it is larger than the sum of its proper divisors (736828153).

221211001223 is an equidigital number, since it uses as much as digits as its factorization.

221211001223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82165.

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

Adding to 221211001223 its reverse (322100112122), we get a palindrome (543311113345).

The spelling of 221211001223 in words is "two hundred twenty-one billion, two hundred eleven million, one thousand, two hundred twenty-three".