143220121 has 16 divisors (see below), whose sum is σ = 167090688. Its totient is φ = 121312000.

The previous prime is 143220109. The next prime is 143220191. The reversal of 143220121 is 121022341.

It is not a de Polignac number, because 143220121 - 2¹⁵ = 143187353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143220095 and 143220104.

It is not an unprimeable number, because it can be changed into a prime (143220191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15096 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (10443168).

Almost surely, 2^143220121 is an apocalyptic number.

143220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143220121 is a deficient number, since it is larger than the sum of its proper divisors (23870567).

143220121 is a wasteful number, since it uses less digits than its factorization.

143220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 143220121 is about 11967.4609253592. The cubic root of 143220121 is about 523.2003334473.

Adding to 143220121 its reverse (121022341), we get a palindrome (264242462).

It can be divided in two parts, 143220 and 121, that added together give a palindrome (143341).

The spelling of 143220121 in words is "one hundred forty-three million, two hundred twenty thousand, one hundred twenty-one".