221231344042 has 16 divisors (see below), whose sum is σ = 334340618112. Its totient is φ = 109787132160.

The previous prime is 221231344013. The next prime is 221231344043. The reversal of 221231344042 is 240443132122.

It is a self number, because there is not a number n which added to its sum of digits gives 221231344042.

It is not an unprimeable number, because it can be changed into a prime (221231344043) 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, 498528 + ... + 831259.

It is an arithmetic number, because the mean of its divisors is an integer number (20896288632).

Almost surely, 2^221231344042 is an apocalyptic number.

221231344042 is a deficient number, since it is larger than the sum of its proper divisors (113109274070).

221231344042 is a wasteful number, since it uses less digits than its factorization.

221231344042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330413.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221231344042 its reverse (240443132122), we get a palindrome (461674476164).

The spelling of 221231344042 in words is "two hundred twenty-one billion, two hundred thirty-one million, three hundred forty-four thousand, forty-two".