221031353004311 has 4 divisors (see below), whose sum is σ = 221599556997000. Its totient is φ = 220463149011624.

The previous prime is 221031353004271. The next prime is 221031353004347. The reversal of 221031353004311 is 113400353130122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221031353004311 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 (221031353004391) 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, 284101995761 + ... + 284101996538.

It is an arithmetic number, because the mean of its divisors is an integer number (55399889249250).

Almost surely, 2^{221031353004311} is an apocalyptic number.

221031353004311 is a deficient number, since it is larger than the sum of its proper divisors (568203992689).

221031353004311 is an equidigital number, since it uses as much as digits as its factorization.

221031353004311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568203992688.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 221031353004311 in words is "two hundred twenty-one trillion, thirty-one billion, three hundred fifty-three million, four thousand, three hundred eleven".