121443142001 has 4 divisors (see below), whose sum is σ = 123501500400. Its totient is φ = 119384783604.

The previous prime is 121443141977. The next prime is 121443142027. The reversal of 121443142001 is 100241344121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100241344121 = 37571 ⋅2668051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121443142001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121443142201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029179111 + ... + 1029179228.

It is an arithmetic number, because the mean of its divisors is an integer number (30875375100).

Almost surely, 2^121443142001 is an apocalyptic number.

It is an amenable number.

121443142001 is a deficient number, since it is larger than the sum of its proper divisors (2058358399).

121443142001 is an equidigital number, since it uses as much as digits as its factorization.

121443142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058358398.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121443142001 its reverse (100241344121), we get a palindrome (221684486122).

The spelling of 121443142001 in words is "one hundred twenty-one billion, four hundred forty-three million, one hundred forty-two thousand, one".