121366361026641 has 16 divisors (see below), whose sum is σ = 161957250815360. Its totient is φ = 80843199085440.

The previous prime is 121366361026543. The next prime is 121366361026711. The reversal of 121366361026641 is 146620163663121.

It is a happy number.

It is not a de Polignac number, because 121366361026641 - 2⁷ = 121366361026513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121366361026441) 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 in 15 ways as a sum of consecutive naturals, for example, 48649515 + ... + 51083343.

It is an arithmetic number, because the mean of its divisors is an integer number (10122328175960).

Almost surely, 2^{121366361026641} is an apocalyptic number.

It is an amenable number.

121366361026641 is a deficient number, since it is larger than the sum of its proper divisors (40590889788719).

121366361026641 is a wasteful number, since it uses less digits than its factorization.

121366361026641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447736.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 121366361026641 in words is "one hundred twenty-one trillion, three hundred sixty-six billion, three hundred sixty-one million, twenty-six thousand, six hundred forty-one".