221400120223 has 4 divisors (see below), whose sum is σ = 221405803240. Its totient is φ = 221394437208.

The previous prime is 221400120199. The next prime is 221400120239. The reversal of 221400120223 is 322021004122.

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 221400120223 - 2²⁹ = 220863249311 is a prime.

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 221400120223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400120283) 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, 2782665 + ... + 2861122.

It is an arithmetic number, because the mean of its divisors is an integer number (55351450810).

Almost surely, 2^221400120223 is an apocalyptic number.

221400120223 is a deficient number, since it is larger than the sum of its proper divisors (5683017).

221400120223 is an equidigital number, since it uses as much as digits as its factorization.

221400120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683016.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221400120223 its reverse (322021004122), we get a palindrome (543421124345).

The spelling of 221400120223 in words is "two hundred twenty-one billion, four hundred million, one hundred twenty thousand, two hundred twenty-three".