221121040343 has 4 divisors (see below), whose sum is σ = 252709760400. Its totient is φ = 189532320288.

The previous prime is 221121040303. The next prime is 221121040381. The reversal of 221121040343 is 343040121122.

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 221121040343 - 2¹⁶ = 221120974807 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 (221121040303) 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, 15794360018 + ... + 15794360031.

It is an arithmetic number, because the mean of its divisors is an integer number (63177440100).

Almost surely, 2^221121040343 is an apocalyptic number.

221121040343 is a deficient number, since it is larger than the sum of its proper divisors (31588720057).

221121040343 is an equidigital number, since it uses as much as digits as its factorization.

221121040343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31588720056.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221121040343 its reverse (343040121122), we get a palindrome (564161161465).

The spelling of 221121040343 in words is "two hundred twenty-one billion, one hundred twenty-one million, forty thousand, three hundred forty-three".