142643262121 has 2 divisors, whose sum is σ = 142643262122. Its totient is φ = 142643262120.

The previous prime is 142643262107. The next prime is 142643262161. The reversal of 142643262121 is 121262346241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104280555625 + 38362706496 = 322925^2 + 195864^2 .

It is a cyclic number.

It is not a de Polignac number, because 142643262121 - 2⁷ = 142643261993 is a prime.

It is not a weakly prime, because it can be changed into another prime (142643262161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71321631060 + 71321631061.

It is an arithmetic number, because the mean of its divisors is an integer number (71321631061).

Almost surely, 2^142643262121 is an apocalyptic number.

It is an amenable number.

142643262121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142643262121 is an equidigital number, since it uses as much as digits as its factorization.

142643262121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The spelling of 142643262121 in words is "one hundred forty-two billion, six hundred forty-three million, two hundred sixty-two thousand, one hundred twenty-one".