142161245021 has 2 divisors, whose sum is σ = 142161245022. Its totient is φ = 142161245020.

The previous prime is 142161244969. The next prime is 142161245033. The reversal of 142161245021 is 120542161241.

It is a happy number.

142161245021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116049916921 + 26111328100 = 340661^2 + 161590^2 .

It is an emirp because it is prime and its reverse (120542161241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142161245021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142161244021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71080622510 + 71080622511.

It is an arithmetic number, because the mean of its divisors is an integer number (71080622511).

Almost surely, 2^142161245021 is an apocalyptic number.

It is an amenable number.

142161245021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142161245021 is an equidigital number, since it uses as much as digits as its factorization.

142161245021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 142161245021 in words is "one hundred forty-two billion, one hundred sixty-one million, two hundred forty-five thousand, twenty-one".