1280121165327 has 16 divisors (see below), whose sum is σ = 1754910097920. Its totient is φ = 829526788800.

The previous prime is 1280121165311. The next prime is 1280121165347. The reversal of 1280121165327 is 7235611210821.

It is not a de Polignac number, because 1280121165327 - 2⁴ = 1280121165311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280121165347) 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 in 15 ways as a sum of consecutive naturals, for example, 19168677 + ... + 19235342.

It is an arithmetic number, because the mean of its divisors is an integer number (109681881120).

Almost surely, 2^{1280121165327} is an apocalyptic number.

1280121165327 is a deficient number, since it is larger than the sum of its proper divisors (474788932593).

1280121165327 is a wasteful number, since it uses less digits than its factorization.

1280121165327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38404334.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 1280121165327 in words is "one trillion, two hundred eighty billion, one hundred twenty-one million, one hundred sixty-five thousand, three hundred twenty-seven".