353043781221 has 8 divisors (see below), whose sum is σ = 470817779104. Its totient is φ = 235316152080.

The previous prime is 353043781219. The next prime is 353043781243. The reversal of 353043781221 is 122187340353.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 353043781221 - 2¹ = 353043781219 is a prime.

It is a super-2 number, since 2×353043781221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 353043781221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353043781261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11574415 + ... + 11604876.

It is an arithmetic number, because the mean of its divisors is an integer number (58852222388).

Almost surely, 2^353043781221 is an apocalyptic number.

It is an amenable number.

353043781221 is a deficient number, since it is larger than the sum of its proper divisors (117773997883).

353043781221 is a wasteful number, since it uses less digits than its factorization.

353043781221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23184371.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 353043781221 in words is "three hundred fifty-three billion, forty-three million, seven hundred eighty-one thousand, two hundred twenty-one".