143663311221221 has 16 divisors (see below), whose sum is σ = 166412740819968. Its totient is φ = 122572263475200.

The previous prime is 143663311221217. The next prime is 143663311221257. The reversal of 143663311221221 is 122122113366341.

It is not a de Polignac number, because 143663311221221 - 2² = 143663311221217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143663311221271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088111045 + ... + 1088243066.

It is an arithmetic number, because the mean of its divisors is an integer number (10400796301248).

Almost surely, 2^{143663311221221} is an apocalyptic number.

143663311221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143663311221221 is a deficient number, since it is larger than the sum of its proper divisors (22749429598747).

143663311221221 is a wasteful number, since it uses less digits than its factorization.

143663311221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176354492.

The product of its digits is 62208, while the sum is 38.

Adding to 143663311221221 its reverse (122122113366341), we get a palindrome (265785424587562).

The spelling of 143663311221221 in words is "one hundred forty-three trillion, six hundred sixty-three billion, three hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".