42002652121 has 2 divisors, whose sum is σ = 42002652122. Its totient is φ = 42002652120.

The previous prime is 42002651959. The next prime is 42002652149. The reversal of 42002652121 is 12125620024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41640891721 + 361760400 = 204061^2 + 19020^2 .

It is a cyclic number.

It is not a de Polignac number, because 42002652121 - 2⁹ = 42002651609 is a prime.

It is not a weakly prime, because it can be changed into another prime (42002652521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21001326060 + 21001326061.

It is an arithmetic number, because the mean of its divisors is an integer number (21001326061).

Almost surely, 2^42002652121 is an apocalyptic number.

It is an amenable number.

42002652121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42002652121 is an equidigital number, since it uses as much as digits as its factorization.

42002652121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 42002652121 in words is "forty-two billion, two million, six hundred fifty-two thousand, one hundred twenty-one".