221211310013143 has 4 divisors (see below), whose sum is σ = 221227953718408. Its totient is φ = 221194666307880.

The previous prime is 221211310013119. The next prime is 221211310013153. The reversal of 221211310013143 is 341310013112122.

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-221211310013143 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 (221211310013153) 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, 8321832696 + ... + 8321859277.

It is an arithmetic number, because the mean of its divisors is an integer number (55306988429602).

Almost surely, 2^{221211310013143} is an apocalyptic number.

221211310013143 is a deficient number, since it is larger than the sum of its proper divisors (16643705265).

221211310013143 is a wasteful number, since it uses less digits than its factorization.

221211310013143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16643705264.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221211310013143 its reverse (341310013112122), we get a palindrome (562521323125265).

The spelling of 221211310013143 in words is "two hundred twenty-one trillion, two hundred eleven billion, three hundred ten million, thirteen thousand, one hundred forty-three".