221223144109 has 16 divisors (see below), whose sum is σ = 243404812800. Its totient is φ = 199393706160.

The previous prime is 221223144067. The next prime is 221223144127. The reversal of 221223144109 is 901441322122.

It is not a de Polignac number, because 221223144109 - 2¹⁵ = 221223111341 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 (221223144139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440934 + ... + 798040.

It is an arithmetic number, because the mean of its divisors is an integer number (15212800800).

Almost surely, 2^221223144109 is an apocalyptic number.

It is an amenable number.

221223144109 is a deficient number, since it is larger than the sum of its proper divisors (22181668691).

221223144109 is a wasteful number, since it uses less digits than its factorization.

221223144109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357600.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 221223144109 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-four thousand, one hundred nine".