1402121228509 has 2 divisors, whose sum is σ = 1402121228510. Its totient is φ = 1402121228508.

The previous prime is 1402121228441. The next prime is 1402121228597. The reversal of 1402121228509 is 9058221212041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1372095963225 + 30025265284 = 1171365^2 + 173278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402121228509 - 2¹⁹ = 1402120704221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402121228609) 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, 701060614254 + 701060614255.

It is an arithmetic number, because the mean of its divisors is an integer number (701060614255).

Almost surely, 2^{1402121228509} is an apocalyptic number.

It is an amenable number.

1402121228509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402121228509 is an equidigital number, since it uses as much as digits as its factorization.

1402121228509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 1402121228509 in words is "one trillion, four hundred two billion, one hundred twenty-one million, two hundred twenty-eight thousand, five hundred nine".