1329138412061 has 2 divisors, whose sum is σ = 1329138412062. Its totient is φ = 1329138412060.

The previous prime is 1329138412039. The next prime is 1329138412093. The reversal of 1329138412061 is 1602148319231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1321823886436 + 7314525625 = 1149706^2 + 85525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329138412061 - 2¹⁰ = 1329138411037 is a prime.

It is a super-3 number, since 3×1329138412061³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329138414061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664569206030 + 664569206031.

It is an arithmetic number, because the mean of its divisors is an integer number (664569206031).

Almost surely, 2^{1329138412061} is an apocalyptic number.

It is an amenable number.

1329138412061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329138412061 is an equidigital number, since it uses as much as digits as its factorization.

1329138412061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 1329138412061 in words is "one trillion, three hundred twenty-nine billion, one hundred thirty-eight million, four hundred twelve thousand, sixty-one".