1368101219921 has 2 divisors, whose sum is σ = 1368101219922. Its totient is φ = 1368101219920.

The previous prime is 1368101219773. The next prime is 1368101219981. The reversal of 1368101219921 is 1299121018631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1220441629696 + 147659590225 = 1104736^2 + 384265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368101219921 - 2³⁸ = 1093223312977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1368101219981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684050609960 + 684050609961.

It is an arithmetic number, because the mean of its divisors is an integer number (684050609961).

Almost surely, 2^{1368101219921} is an apocalyptic number.

It is an amenable number.

1368101219921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368101219921 is an equidigital number, since it uses as much as digits as its factorization.

1368101219921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 1368101219921 in words is "one trillion, three hundred sixty-eight billion, one hundred one million, two hundred nineteen thousand, nine hundred twenty-one".