143121220242 has 192 divisors, whose sum is σ = 389110213632. Its totient is φ = 34148822400.

The previous prime is 143121220211. The next prime is 143121220247. The reversal of 143121220242 is 242022121341.

It is not an unprimeable number, because it can be changed into a prime (143121220247) 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 95 ways as a sum of consecutive naturals, for example, 13934793 + ... + 13945059.

It is an arithmetic number, because the mean of its divisors is an integer number (2026615696).

Almost surely, 2^143121220242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143121220242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194555106816).

143121220242 is an abundant number, since it is smaller than the sum of its proper divisors (245988993390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143121220242 is a wasteful number, since it uses less digits than its factorization.

143121220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10525 (or 10514 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 143121220242 its reverse (242022121341), we get a palindrome (385143341583).

It can be divided in two parts, 143121 and 220242, that added together give a palindrome (363363).

The spelling of 143121220242 in words is "one hundred forty-three billion, one hundred twenty-one million, two hundred twenty thousand, two hundred forty-two".